Sendmail delivers to wrong person

[Jung-Hoon Kang]

Has anybody seen this strange behaviour of sendmail?
This is what happens.

1. Send a mail to userA.
2. Sendmail sends it to userB or/and userC but not to userA. mail.log says same story.
3. The message userB and userC get says "To=userA" in header.

This situation happened several times so far.
Any idea?
Thanks in advance.

[Tracey]

Does userA have a .forward file in their home directory that forwards to userB or userC?

[Jung-Hoon Kang]

No aliasing at all.
All users are normal unix accounts.

[Jung-Hoon Kang]

No forwarding.
This situation happens once in a while.

[Tracey]

Maybe your alias database needs rebuiling from the current file?

[Douglas Cromby_1]

You could try recreating the aliases table in case you are somehow using an old one. You can do this as follows:

/sbin/init.d/sendmail stop
newaliases
/sbin/init.d/sendmail start

If this does not solve it, try running sendmail in verbose mode to on the command line to check how he messages is being sent eg.

sendmail -v userA
test
.

Are you using DNS or a hosts file to route the message? Are they both in order depending on which you are using?