K N O W N   B U G S   I N   S E N D M A I L
			     (for 8.6.3)


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.

* "SYSERR: openmailer(local): fd 1 not open" message

  File descriptor 1 (standard output) should not be closed during normal
  processing.  This is checked periodically, and sometimes this condition
  is found and this message is produced.  Sendmail repairs the problem,
  and the mail is still delivered, but I still don't know why it happens.
  (There was a bug that was fixed in 8.6.beta.13 that might be related,
  but I think this bug still exists.)

* 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.

* Route-addrs missing angle brackets.

  There are cases where route-addrs do not get angle brackets around them,
  such as in the "-r" flag on mailers or in the From_ line created when
  mailing to files.

* 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.

(Version 8.9, last updated %G%)