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-
-
- K N O W N B U G S I N S E N D M A I L
- (for 8.6.7)
-
-
- The following are bugs or deficiencies in sendmail that I am aware of
- but which have not been fixed in the current release. You probably
- want to get the most up to date version of this from FTP.CS.Berkeley.EDU
- in /ucb/sendmail/KNOWNBUGS. For descriptions of bugs that have been
- fixed, see the file RELEASE_NOTES (in the root directory of the sendmail
- distribution).
-
- This list is not guaranteed to be complete.
-
-
- * Null bytes are not handled properly.
-
- Sendmail should handle full binary data. As it stands, it handles
- any value from 0x01-0xFF in the body and 0x01-0x80 and 0xA0-0xFF in
- the header. Notably missing is 0x00, which would require a major
- restructuring of the code -- for example, almost no C library support
- could be used to handle strings.
-
- * Duplicate error messages.
-
- Sometimes identical, duplicate error messages can be generated. As
- near as I can tell, this is rare and relatively innocuous.
-
- * No "exposed users" in "nullrelay" configuration.
-
- The "nullrelay" configuration hides all addresses behind the mail
- hub name. Some sites might prefer to expose some names such as
- root. This information is always available in Received: lines.
-
- * $c (hop count) macro improperly set.
-
- The $c macro is supposed to contain the current hop count, for use
- when calling a mailer. This macro is initialized too early, and
- is always zero (or the value of the -c command line flag, if any).
- This macro will probably be removed entirely in a future release;
- I don't believe there are any mailers left that require it.
-
- * If you EXPN a list or user that has a program mailer, the output of
- EXPN will include ``@local.host.name''. You can't actually mail to
- this address. It's not clear what the right behaviour is in this
- circumstance.
-
- * REDIRECT aliases don't work with `n' option.
-
- If you have option `n' set when you use newaliases and have
- REDIRECT addresses in your aliases file, you'll get the error
- messages during the newaliases instead of when email is sent to
- the address in question. The workaround is to turn off the `n'
- option.
-
- * MX records that point at non-existent hosts work strangly.
-
- Consider the DNS records:
-
- hostH MX 1 hostA
- MX 2 hostB
- hostA A 128.32.8.9
-
- (note that there is no A record for hostB). If hostA is down,
- an attempt to send to hostH gives "host unknown" -- that is, it
- reflects out the status on the last host it tries, which in this
- case is hostB, which is unknown. It probably ought to eliminate
- hostB early in processing.
-
- * NAME environment variables with commas break.
-
- If you define your NAME environment variable to have a comma
- (e.g., ``Lastname, Firstname''), and you are using the $q definition
- that uses ``name <address>'' format, sendmail treats the first and
- last names as two addresses, thus producing a bogus From line. You
- can work around this by changing the $q definition to use
- ``address (name)''.
-
- * \231 considered harmful.
-
- Header addresses that have the \231 character (and possibly others
- in the range \201 - \237) behave in odd and usually unexpected ways.
-
- * DEC Alphas (OSF/1 1.3) sometimes time out on sending mail.
-
- I have one report that DEC Alphas acting as SMTP clients sometimes
- will apparently not see the "250 OK" message in response to the
- dot that indicates the end of the message. This only happens if
- the message is run from the queue -- if it gets through on first
- try, everything is fine. I have been unable to reproduce this
- problem at Berkeley.
-
- * accept() problem on SVR4.
-
- Apparently, the sendmail daemon loop (doing accept()s on the network)
- can get into a wierd state on SVR4; it starts logging ``SYSERR:
- getrequests: accept: Protocol Error''. The workaround is to kill
- and restart the sendmail daemon. We don't have an SVR4 system at
- Berkeley that carries more than token mail load, so I can't validate
- this. It is likely to be a glitch in the sockets emulation, since
- "Protocol Error" is not possible error code with Berkeley TCP/IP.
-
- I've also had someone report the message ``sendmail: accept:
- SIOCGPGRP failed errno 22'' on an SVR4 system. This message is
- not in the sendmail source code, so I assume it is also a bug
- in the sockets emulation. (Errno 22 is EINVAL "Invalid Argument"
- on all the systems I have available, including Solaris 2.x.)
-
- * Sending user deletion not done properly in :include: lists.
-
- If you don't have the "m" (me too) option set, then a person
- sending to a list that contains themselves should not get a copy
- of the message. However, if that list points to a :include: file
- that has one address per line, this will break, and the sender
- will always get a copy of their own message, just as though the
- "m" option were set.
-
- You can eliminate this by adding commas at the end of each line
- of the :include: file.
-
- * Excessive mailing list nesting can run out of file descriptors.
-
- If you have a mailing list that includes lots of other mailing
- lists, each of which has a separate owner, you can run out of
- file descriptors. Each mailing list with a separate owner uses
- one open file descriptor (prior to 8.6.6 it was three open
- file descriptors per list). This is particularly egregious if
- you have your connection cache set to be large.
-
- (Version 8.18, last updated 3/14/94)
-