Weasel

LIST OF CHANGES Version 2.52 ( 6 Dec 2018) Fixed: INI corruption caused by error in checking for duplicate hosts. First attempt at displaying an "outbound SMTP" count.

LIST OF CHANGES Version 2.51 ( 4 Dec 2018) Count of entries added to Setup pages that show lists of hosts.

LIST OF CHANGES Version 2.5 (25 Nov 2018) Added option to reject mail that fails a reverse DNS lookup. Changed the rules about the decision whether to use INI or TNI format (see manual).

LIST OF CHANGES Version 2.49 (18 Nov 2018) Nonrouteable addresses are no longer checked by RBL. Minor change to manual: wildcard entries are allowed on the whitelist page of Setup. In all host lists, duplicate entries are removed when you exit Setup. Fixed: confusion between POP and SMTP when decoding the ServerEnabled flags.

LIST OF CHANGES Version 2.48d (13 Sep 2018) Changed watchdog code to avoid a critical race. Minor change to message about reloading INI data. Stricter interpretation of option to not log POP sessions.

LIST OF CHANGES Version 0.373 (17 Aug 2017) Rebuilt to accommodate changes in support for 64-bit numbers, and changes in Weasel Setup.

LIST OF CHANGES Version 2.48 (10 Aug 2018) Fixed: obscure bug in BDAT processing. Fixed: stack overflow on nameserver lookup. Fixed: source code corruption in POPCommands.mod. "No chunking" hosts removed from Setup. Chunking is now supported whenever it is supported at the other end of a connection. You can still specify a maximum outgoing chunk size in Setup. Version 2.47 (23 Jul 2018) Not released. Version 2.46 (21 Jul 2018) Fixed: error response when POP RETR fails. New: allow for CNAME nameserver records when doing an MX lookup. This version proved to be unusable.

LIST OF CHANGES Version 2.46 (21 Jul 2018) Fixed: error response when POP RETR fails. New: allow for CNAME nameserver records when doing an MX lookup.

LIST OF CHANGES Version 2.44e (27 May 2018) Fixed: "Delete domain" operation was deleting two domains. Added domain count to the "Domains" Setup page. Not yet released.

LIST OF CHANGES Version 2.44 (14 Jan 2018) New approach to watchdog, using fewer threads. Internal change: test for detached process moved to module TaskControl. Top screen line now lists number of users instead of "online" status. Added NoChunkingHost category, and a "Chunking" page in Setup. Version 2.43 (18 Nov 2017) Moved password attack protection into a separate module. Slightly tougher rules for repeated password guessing. Fixed minor bug in the POP log. Added a limited number of retries (about 5 seconds) before reporting "mailbox is locked".

LIST OF CHANGES Version 0.372 (18 Jun 2017) Rebuilt to accommodate changes in some of the underlying support modules. Fixed: incorrect check at startup on whether IMAP is enabled. Not yet released.

LIST OF CHANGES Version 2.42 (30 Aug 2017) Minor change to manual. Fixed Setup bug that would cause Weasel to incorrectly assume that \MPTN\ETC\MAIL was the mailroot directory even if it wasn't. Slight change to shutdown processing. Allowed for a nonstandard port in via: addresses. Modified looping test to allow for multiple mail servers on different ports, same machine.

LIST OF CHANGES Version 2.41 (17 Aug 2017) Added CheckRelayRules.cmd and Sample_RELAYRULES.TXT to the distribution. New option on the "Relay" page of Setup to route outgoing mail using a "relay rules" file.

LIST OF CHANGES Version 2.4 (24 Jul 2017) Rules about whether to use INI or TNI extended to the case of remote setup.

LIST OF CHANGES Version 2.39 (20 Jul 2017) Alterations to allow TNI files to be used as default without having to use a -T parameter. New option to support this on the first Setup tab. Several consequential changes to the manual. New program ChooseTNI added to the distribution.

LIST OF CHANGES Version 2.38 (14 Jul 2017) Experimental check on time taken by blacklist checker. Disable a blacklist checker for an hour if it takes more than a minute to do the check. More careful guard against SMTP timeouts. For incoming mail, added a failure response for BDAT chunk size > 5 MiB. For "chunk size too large" and similar errors, we delay the error response until the chunk has been received (and ignored). Fixed a conflict between Weasel and imapd.

LIST OF CHANGES Version 2.37 (11 May 2017) Fixed: some of the checks for a valid sender address were being skipped. Added check for "out of heap memory" while receiving chunked data. Fixed: if sending mail failed at the DATA or BDAT stage, the sender got the wrong error message. Fixed: miscalculation of how much chunked data to send when there are dot-stuffed lines. Fixed: memory leak when chunked data send failed.

LIST OF CHANGES Version 2.36 (27 Apr 2017) Recoded some of the CHUNKING operations to be consistent with dot-stuffing.

LIST OF CHANGES Version 2.35 (17 Apr 2017) Fixed some minor logging errors. More accurate message size in SMTP log. Implemented the CHUNKING option (RFC 3030) to give faster data transfer for large message files, if the other server supports it.

LIST OF CHANGES Version 2.34 ( 8 Apr 2017) Fixed faulty POP fetch. Cleaned up some log file messages. Version 2.33 ( 5 Apr 2017) EHLO response now includes 8BITMIME. Fixed: two files were missing from source distribution. Fixed: disabling SPF did not "stick" in Setup until Setup had been run several times. Added note to manual about situations where you should not enable SPF. Added SPF results to transaction log. Added direction indicator to transaction log entries. Change to retry strategy: we will not retry if the error code is 552 (exceeded storage limit).

LIST OF CHANGES Version 2.33 ( 5 Apr 2017) EHLO response now includes 8BITMIME. Fixed: two files were missing from source distribution. Fixed: disabling SPF did not "stick" in Setup until Setup had been run several times. Added note to manual about situations where you should not enable SPF. Added SPF results to transaction log. Added direction indicator to transaction log entries. Change to retry strategy: we will not retry if the error code is 552 (exceeded storage limit).

LIST OF CHANGES Version 2.32 ( 6 Mar 2017) SMTP output transactions are now included in the transaction log.

Version 2.31 (13 Jan 2017) Added check to reject mail with a missing From: header. Changed the rules about when we will retry, or try a relay host, for an outbound message that failed. Fixed: weasel.xqs was missing from distribution.

Version 2.3 (14 Dec 2016) Skip SPF check for whitelisted host. Fixed "ptr" bug in SPF check. Extra "banned host" check in HELO and EHLO commands. Slight revision of how the MAIL FROM address is checked for acceptability. More generous rules about what parameters may be changed without restarting Weasel. Added option to suppress POP sessions in transaction log. Fixed: maximum message size was not being updated. Added option to disable the SPF check. Removed postmastercheck.cmd from distribution, put it on web site instead. Miscellaneous changes to the manual. Altered EHLO response for stricter compliance with standard.

Extra "banned host" check in HELO and EHLO commands.

LIST OF CHANGES Version 2.29 (27 Oct 2016) Added log message to show username on AUTH. Fixed: session could time out during postmaster check. Added an SMTP whitelist. Added CIDR option to host lists (banned, whitelisted, etc.) Added an "edit" button to all host list pages. Preliminary version of SPF check included. For now this does not reject mail, it only puts a result in the Authentication-Results message header.

Version 2.28 (05 Aug 2016) Moved IPF files to source distribution, and added weasel.bmp. Added a separate manual for VIOSetup.

LIST OF CHANGES Version 2.27 (29 May 2016) Fixed: crash when a mailbox contains more than 2^32 bytes (about 4 GB) of messages. Implemented message size limit (RFC 1870).

LIST OF CHANGES Version 2.26 (31 Jan 2015) Fixed: dangling pointer while creating lists of "separate filter" users.

LIST OF CHANGES Version 2.25 (25 Jan 2015) Increased size of ArgString used to call a filter, to allow for the worst case filenames. Fixed: memory leak when stage 0 filter rejects an SMTP connection.

LIST OF CHANGES Version 2.24 (08 Dec 2015) Fixed: incorrect handling of greylisting.

LIST OF CHANGES Version 2.23 (07 Dec 2015) Fixed: Weasel was ignoring postmaster check option in Setup. Added option to bind outgoing mail to specific IP address. Fixed: parsing of an envelope address when the MAIL command has an AUTH parameter.

LIST OF CHANGES Version 2.22 (03 Dec 2015) Improvements to the postmastercheck algorithm. Updated Setup.exe and the manual. The postmaster check can now be disabled using Setup.

LIST OF CHANGES Version 2.21 (02 Dec 2015) Improvements to the postmastercheck algorithm. Updated Setup.exe and the manual. The postmaster check can now be disabled using Setup.

LIST OF CHANGES Version 2.2 (28 Nov 2015) Fixed errors in implementation of postmaster check. Skip postmaster check for local domains. Elimination of a few false positives in postmaster check.

LIST OF CHANGES Version 2.12 (17 Nov 2015) Fixed error in implementation of postmaster check. Skip postmaster check for local domains. Not yet released.

LIST OF CHANGES Version 2.1 (12 Nov 2015) Fixed an error in makefolder.cmd. Fixed: conflict when "forward", "keep copy" and "separate filter" all activated together. Added the "X-PostmasterCheck" header and associated postmastercheck.cmd filter.

LIST OF CHANGES Version 2.01 (19 Sep 2014) Fixed: SMTP authorisation failing when "all users may use SMTP AUTH" was not set for this domain. Removed some obsolete registration checks. Version 2.0 (10 Sep 2014) Fixed: wrong domain was being written to POP.LOG Major overhaul of the manual. Now released as open-source with GPL licence.

LIST OF CHANGES Version 1.704 (7 July 2004) Changes to message list construction on POP3 login to eliminate a faulty memory reference and to improve efficiency. Version 1.703 (1 July 2004) Added option to use a fixed hostname to report as our own hostname. Altered order of notebook pages. Fixed: occasional crash on UID calculation. Fixed: Setup problem in multidomain mode, where the default domain name kept being re-created. Version 1.702 (31 May 2004) Option to change the length of time we continue to attempt to send outgoing mail. Setup notebook changed to new style. Version 1.701 (30 May 2004) Allow user%domain as another acceptable POP login username. Version 1.70 (21 May 2004) Support for different languages in Setup. This version is distributed with English, French, and Dutch language files, but it is easy to add more. Setup notebooks now remember fonts dropped on them. Added new user options: inactive account, forward mail with or without local copy. Policy change: if a filter returns a "reject this mail" decision, we send the reply to the client, and then send a "421 closing connection" reply, and then we forcibly cut off the client. This is to protect us against the increasingly aggressive approach of junk mail software. Policy change: rDNS lookup on numeric IP addresses is not done unless and until necessary. Policy change: the loopback address [127.0.0.1] is now automatically a "Trusted" address that is allowed to send relay mail. More flexible rules for the syntax of an IP address range. Added some delays to discourage dictionary searches: - 2 seconds after POP password error (note that there is already a limit of 3 attempts to log in) - 10 seconds before SMTP "unknown user" reply - 10 seconds after an SMTP RSET command Indented continuation lines in screen log. Added initial server response to log. Extra "End of session" log message to make log analysis easier. Added "pipe" to transaction logging options. "Override filter" option now works even when there are multiple recipients, possibly with different filters for each recipient. Fixed: adjust Return-Path header after calling a filter. Fixed Setup bug: option to log SMTP users was not being remembered. Permit a delivery attempt via backup server if original server gives 550 or 553 response to RCPT command. Fixed: failure to try backup relay if the initial attempt failed on the MAIL FROM command. Added an option to relay everything, for the case where this server has no local users and is simply acting as a front end for another mail server. Now can change all logging options without restarting Weasel. Made the log file names configurable. Added a new reply code 16 for filters, meaning "accept this message and skip future filtering steps". Setup changed to fix a "lost users" bug that appeared when remote setup was used in multidomain mode. Also minor other changes to Setup. Version 1.68 (8 Oct 2003) New limitation: POP3 users will see only the first 1024 messages in their mailbox. (But they will see the next 1024 after the first group has been fetched and deleted.) This change has been made necessary as the result of the current campaign by junk mailers to crash servers that support anti-junk measures. More permissive rules about which Setup options can be changed without restarting the server. See WEASEL.INF for the details. Fixed: handling of the "no valid users" case when mail is relayed. Fixed: damaged header line in the case where the Return-Path header is more than one line long. Fixed: undesirable looping behaviour when a secondary relay keeps re-attempting to send mail that has already been rejected by the primary server. Scavenge utility removed from the distribution. Added the filter names and "serialise filters" option to the list of things that can be changed without restarting. Corrected misleading "no relay path to destination" that is sometimes given when a different message would be more appropriate. Version 1.67 Fixed Setup bug (couldn't turn off SMTP authentication). On POP fetch, add an extra CRLF for mail that violates the SMTP standard by ending lines with LF rather than CRLF. (Only old Unix software does this, as far as I know, but apparently there are still people who use old Unix software. In addition, we have to allow for spammers and Microsoft, both of whom tend to introduce new standards violations without prior warning.) Expanded the set of Setup parameters alterable without having to restart the server. More careful definition, in WEASEL.INF, of which Setup options take effect immediately, and which ones require the server to be restarted. Rule change: unregistered users may use multidomain mode, but only the first domain will be supported. (The ultimate aim is to migrate everyone to multidomain mode.) Updated VIOSetup to support some (but not yet all) of the new configuration options supported by Setup. Version 1.66 Major change to filtering system. Filters may now be called at up to five different times during an incoming SMTP session. If there is only one local recipient, there is also an option to replace the default final filter by a user-specific filter, or to skip the filtering for some users. As a side-effect, the order of parameters passed to the filter has changed, therefore existing filters need to be modified. Fixed a bug that would cause Weasel to fail if SMTP was disabled. Since this bug has been present for many versions, and has never been reported, this tends to suggest that nobody ever uses Weasel in conjunction with another SMTP server. Added a message to the log file to say "Delivered" or "Failed to deliver" for an SMTP outgoing mail item, to make it easier for log analysis tools to distinguish between success and failure. Made the responses to spammers a bit more consistent with RFC2821. (With some reluctance. I still think that RFC2821 makes too many concessions to tolerating spammers.) Moved endmail.exe and scavenge.exe to the tools subdirectory, on the grounds that most people won't need them. Fixed: crash on invalid AUTH command. Added an error message for the "No command supplied" case. (An empty SMTP command should never occur, but the spamming software is getting sloppier in terms of ignoring the standards.) Changed the upper limit on number of threads for outbound mail to 64. Changed the default for "log outgoing mail" to FALSE. Fixed: (rare) SETUP crash when working on aliases. Changes in internal library implementations. Fixed an error in CRAM-MD5 authentication. Increased the stack size per thread to 64 KiB. Version 1.65 This (buggy) version withdrawn immediately after release. Version 1.64 Fixed error in verifying a POP login. You can now specify how many threads will handle outbound mail (range 1..99). Added option of a log file (SMTPOUT.LOG) for outgoing mail. Updated LoadINI and DumpINI to handle options that have been added in recent changes. Fixed: recipient list passed to a filter could contain remote addresses resulting from an alias expansion. Clear all 'LOCK.!!!' files at startup. (Previously this was being done only for the single-domain case.) Version 1.63 Don't automatically create a 'postmaster' account if there is an alias, possibly wild, that will handle 'postmaster' mail. Fixed: crash when loading complicated set of aliases, a crash that appears to be caused by an OS/2 Prf API bug. Increased the "listen" queue length to 5. Removed the "routing loop?" from the "no relay path to destination" error message, because there are too many cases where this is a temporary loss of connection rather than a routing loop. For outgoing mail, increased the timeout on the initial connection attempt from 75 to 150 seconds. This is to accommodate the deteriorating network performance now that so many ISPs are replacing their fast Unix mail servers by slow Windows servers. Version 1.62 Identifies EXPN as a supported ESMTP command, even though we will respond only with "that information is confidential". Avoid creating a redundant postmaster directory in multidomain mode. Implemented AUTH command for both incoming and outgoing SMTP, with methods PLAIN, LOGIN, CRAM-MD5. Removed the "accept mail for unknown users" option, and added conversion code in Setup and VIOSetup to add a wildcard alias if that option had been set. Added a 'Demote' option to the Alias page in Setup. For outgoing mail that has to be retried, we now wait until after several attempts before sending the sender a "delivery has been delayed" notification. (The previous strategy was to send that notification after the second attempt, which was probably too soon.) Version 1.61 New interpretation of alias expansion: if there is no '@' in an address, we assume the current domain. Fixed: some "delivery failure" messages were using [127.0.0.1] as the name of the sending host. Avoid sending a bounce message to the address <>. Clearer indication that registration code has been accepted. Version 1.60 General tidying up to permit a non-beta release. First official release of the multidomain feature. Version 1.59 Permit wildcards in alias names. Added test for NIL descriptor in TaskControl.SuspendMe, and increased heap limit to 8MB. Made the software again runnable on older 16-bit versions of the tcp/ip stack, as well as on the newer versions. Version 1.58 Fixed a bug in alias expansion that was causing redundant files to be created in the MailRoot directory. In single-domain case only, switched back to something similar to the older method for identifying a POP user. On incoming mail, long lines wrapped if they go over 1000 characters. (This is helpful for e-mail clients that get confused by junk mail that violates the SMTP standard.) More care that our hostname matches the IP address in things like HELO parameter, timestamps, etc. Version 1.57 Added option to say whether password should be used to work out which POP3 user is logging in, in the case where the same username occurs in more than one domain. Added a check for duplicates in "Add all local IP addresses". Changed the "unknown user" error code from 553 to 550. Added test for unknown local user during alias expansion. Removed the "via" message from the log in the case of an unsuccessful delivery attempt. Documentation of multidomain mode added. Timed demo now enabled until the end of January 2003. Version 1.56 Fixed error: mail could be duplicated if a message was received just as we were going on-line. Added a "too many hops" check on incoming mail. Allow optional parameters for DumpINI and LoadINI. Fixed initialisation failure when a hostlist contained a numeric range of IP addresses. Fixed error: data being lost when users moved to a different domain. Better handling of the case where a filter changes or deletes the "Return-Path" header line. This version released as a beta, not as a public release. Version 1.55 Fixed an error in alias expansion. Includes time-limited demo of multidomain mode, untested. This version released as a beta, not as a public release. Version 1.54 Added option to auto-detect dial-up connection. Major internal changes in hostlist handling in preparation for the switch to multidomain support. Added an error check to the "create thread" operation. This version released as a beta, not as a public release. Version 1.53 Removed detailed counts for outgoing mail. Yet another change to shutdown handling. Version 1.52 Slight change to shutdown handling. Also added a FINISHED event semaphore, to confirm shutdown complete. Version 1.51 Don't reset the RECEIVED semaphore before posting, for better Major Major response. Slight change to shutdown thread, to avoid need for typing Ctrl/C twice. Version 1.50 Added a global semaphore to force shutdown. The namelist for a filter no longer reveals the expansion of aliases. Made the initial 'checking' messages more visible. Modified the 'for' part of the 'Received:' header line, to be an accurate copy of the RCPT TO: address. Fixed bug where mail queued before we went online was sent twice. Version 1.40 Altered the queue throttling algorithm for outgoing mail. Increased limit on POP username size to 255. Allow filters to return a message to be sent to the client in the case of rejection by filter. Refined test for when an outgoing mail is not worth retrying. Corrections to the way the number of jobs in progress is calculated. In POP command DELE, added check for deleting a message that has already been deleted. Changes to make it harder for an attacker to guess passwords, e.g. we don't reject a POP login attempt when an incorrect username is received, we wait until after the password is supplied. Fixed a memory leak in MD5 calculation (affects UIDL). Corrected bug introduced in version 1.30 related to huge file support. This version should again work with pre-FP15 versions of Warp. Domain included in local addresses passed to a filter. (This corrects a regression made in version 1.30) Setup: added count of users. Version 1.30 Increased number of worker threads that send mail to 16. Radical change to the way the outgoing mail is sorted. This should improve mailing list performance. Optional serialisation of filter operations, to compensate for Rexx scripts that can't handle more than one thread at a time. For relay host, use direct lookup rather than MX lookup. Extra guard against memory overflow in high-traffic conditions. Mail no longer sent through backup relay for recipients where the original server has rejected this user. New way of specifying blacklist sites, as a result of the way those sites have changed. In Setup and VIOSetup, added check for a user name that duplicates an alias, or vice versa. VIOSetup now supports most things that Setup does. Fixed bug: misleading error message if no valid recipients. Fixed memory leak in UIDL command. Version 1.20 Speed improvement for POP3 fetch of big message. New rule: dot-stuffed lines remain dot-stuffed as long as they are in the Weasel mail directories (including the 'forward' directory). Previous versions removed the extra dot, then reinserted it when a POP user did a fetch. This will require a change to any software that deposits mail directly into the Weasel directories. This change implies that anyone who upgrades to the new version of Weasel should also upgrade to the new versions of - popget - qmail - Major Major - EchoNews if they're using those packages. Added a check for faulty nameserver response. Fixed error in Setup: blacklist options weren't always being stored correctly. Fixed obscure error in handling a range of IP addresses. Fixed error in the Setup 'Promote' option. New way of identifying a thread, to get around possible bug in run-time system. Version 1.10 Added more anti-spam options in the "Options" setup page. Option of extra detail in transaction log. Replaced all RndFile operations by API calls. Error reply returned for "Mailbox already locked" for better conformance with POP3 standard. This reverses a change made in version 0.4. Check for case of retry scheduled for negative time in future. Version 1.00 Fixed: was not working properly if started from inetd. More detailed logging of outbound mail. New 'techdata' manual added to the distribution. Format of TNI file changed significantly. Better buffering of socket I/O. New rule for POP-before-SMTP authentication: once it has obtained this authorisation, an SMTP client keeps it for multiple operations, as long as the authorisation time doesn't expire between operations. Changed computation of a message UID so that it also depends on file date and time. Permit old-fashioned path specification in the SMTP commands MAIL and RCPT. Fixed: crash when POP user supplied an empty username. Version 0.99 Removed reliance on tcp_h_errno(), which appears to be giving faulty results. Removed a case sensitivity in user names in PMSetup. Renamed PMSetup.exe to Setup.exe. Version 0.98 Renamed Setup.exe to VIOsetup.exe. Include domain name for local users in recipient file used by filters. Direct delivery of local mail even if "use relay host always" option is in force. External program can now force check of "forward" directory by posting an event flag. (Feature added to make Major Major output faster.) In addition Weasel now posts an event flag on incoming mail. Added check that ensures that the SMTP commands for outgoing mail use angle brackets around the addresses. Version 0.97 Fixed error: multiple copies of mail being sent out. MIME encapsulation for failure message. Version 0.96 Periodic re-scan of "forward" directory to see whether mail has been placed there by other programs. Endmail modified so that it no longer uses the $i parameter, for compatibility with newer versions of sendmail. (This won't affect most Weasel users. It's relevant only if you use a Weasel/sendmail combination.) PMSetup changed so that "public" is the initial default for an alias. Faster shutdown when dealing with hard-to-deliver mail. We now add Message-ID header if it's missing. Adaptive timeout for outgoing SMTP connection. In SMTPData.AcceptOneLine, made provision for a Nul appearing as an incoming data character. Fixed error: was running out of memory when there were more than 800 mails waiting to be sent. Version 0.95 Fixed a list corruption problem in POP-before-SMTP authentication. Removed the source files and some of the tools from the main distribution. (Tools are now available for separate download - they rarely change from one version to another.) Version 0.94 Added option for POP-before-SMTP authentication. Filter strategy changed back to using DosExecPgm (since the other solution was preventing filters from being run when Weasel was run detached). Fixed an error in the Setup "promote host" operation. Added server replies to detailed transaction log. Added option to specify a nonstandard relay port. Added "Real name" and "comments" fields to user data in PMSetup. Version 0.93 Added option to use Realtime Blackhole List. "Bounce" messages to local users are now delivered without having to go on-line. Fixed PMSetup bug (SMTP timeout) Filter strategy changed - now using DosStartSession which appears to be more reliable. Transaction log now shows which host we sent mail through. Fixed a PMSetup bug - was failing to write back a host list after all items were deleted. Added option to check whether the MAIL FROM address is on a blacklisted host. Added option to use a relay host as a backup. Version 0.92 Added option to accept mail for unknown users. Added -G option to PMSetup. Check whether outbound mail is looping. Minor change to POPGET - doesn't create new directories. Simplified module TaskControl. Fixed some memory leaks in the kernel. Filters now inherit the environment, including PATH. Reduced the "going online" delay to 4 seconds. Version 0.91 Now using version 2.32 of the compiler. This should fix a "thread leak" problem. Fixed error in filtering: non-local recipients were missing from the list of recipients. Added SEND.CMD to the Tools collection. Repaired error in POPGET.CMD. More accurate handling of timeout. Fixed socket leak on "failed to connect" condition. Added a "for" item on the timestamp, but only in the case of a single recipient. Allow for longer responses from nameserver. Version 0.90 PMSetup in remote mode now creates user directories if necessary (requires an upgrade to version 0.4 of INIServe). Fixed a problem in endmail. SMTP log uses IP address if hostname cannot be found. Tightened up a check for pathological cases; this seems to solve a problem where hard-to-reach destinations led to a crash. Version 0.88 Added SMTP and POP log files. Changed way we determine our own host address. Minor enhancements to PMSetup. Allow a numeric range in a list of host names. Minor change to screen output format. Fixed a Setup bug that was causing a spurious error message in the log, and another that was causing the "relay dest" list to be incorrectly stored. Version 0.87 New system for wildcard matching on host names. Optional filter for incoming mail. Relay mail allowed to specified destinations. Setup updated to allow for new options. Outgoing mail is held until a file 'ONLINE' exists. Complete rewrite of PMSetup. Version 0.86 Fixed a problem with wildcard matching. Version 0.85 Timeout on remote host when sending mail. Now running 4 threads for outbound mail. Minor fix to reading mailroot from INI file. Major change to the way "forward" mail is stored. Scavenge.exe modified to convert any unsent mail to the new format. Setup creates mailroot directory if it didn't exist. Obsolete threads killed a little faster. Fixed a problem where a session would time out when transferring a large file. PMSetup added to distribution. Version 0.83, 0.84 (Private test versions, never released.) Version 0.82 Fixed a memory allocation error in LoadINI. Minor change in the host name-matching, which might help with a reported error of wildcards not working. Fixed a problem of spurious characters being inserted in incoming mail that contains byte-stuffing at beginning of line. Minor correction to the nameserver lookup code, for the case where there is no MX entry for the destination domain. REXX script to migrate OS2PopS user data. Version 0.81 Fixed an error that caused the software to lose track of some outgoing messages. Scavenge utility added to the distribution. Version 0.8 Change in MX check - swap byte order of IP address in case where MX record not found. (And software tidied up to guard against other cases of confusion between network byte order and host byte order.) Changed the re-try strategy, to improve the chances of successful delivery of mail to hard-to-reach destinations. Increased the number of retries, to a total of 26 attempts over four days. Version 0.7 Redundant nameserver lookup removed (should speed up delivery slightly for outgoing mail). Fixed an error in APOP authentication calculation. SMTP connection dropped if client sends too many undecipherable commands. Changed the "user not local" response code from 251 to 250, to work around a Netscape bug. Source code added to distribution. Version 0.6 More detailed checks for a valid sequence of SMTP commands. More careful checking for uniqueness of generated file names for received mail. Added a Return-Path: line to mail header on final delivery. In host name lists, the single character "." now matches anything. New option to send all outgoing mail via a relay. Added SMTP commands VRFY, EXPN, EHLO. Added POP commands APOP, UIDL. Added sender IP address to the "Received:" line on incoming mail. Version 0.5 Retries of outgoing mail (for 4 days) implemented. Fixed an error in alias expansion. Fixed a problem of sockets not being released. Version 0.4 New feature: aliases. Local host names: we now accept "mymachine" as a synonym for "mymachine.localdomain". If POP mailbox is locked, extra clients can still log in, but they'll see an empty mailbox. Added check for duplicate local recipients. Fixed a bug that caused the SMTP server to use an alias instead of the official host name. Local usernames are now case-insensitive; but we don't alter the case of remote usernames, in case the remote server uses case sensitivity. Version 0.3 Mail relaying permitted for trusted hosts. (This is the biggest change - I had to add a major subsystem for dealing with outgoing mail.) Locked mailboxes automatically unlocked at startup. New "wildcard" syntax for domain names in Setup. General overhaul of everything. Version numbering system changed. Version 0.02 Added check for missing user directory. Fixed a logging error: transaction log was going to the wrong file, and causing the INI file to explode in size. Inetd option implemented (but not yet tested). Allowing a list of possible names for the current host. Check for banned clients. Version 0.01 First beta-test release.