Rejecting incoming emails with blank senders (Sendmail)

[Jason Williams]

I swear, I just saw this on a recent thread here, but for the life of me,
I cannot rememeber the name of the thread. So far, I have had much luck
searcing the archives.

Im running Sendmail (switching to postfix soon) and I've seen a lot of
emails today come in with empty sender addresses:

Dec  8 15:21:04 serenity sm-mta-in[58836]: jB8NL2Mn058836: from=<>,
size=4633, class=0, nrcpts=1,
msgid=<20051208225239.C5C345C0A1DA at mwinf3010.me.freeserve.com>,
proto=ESMTP, daemon=MTA, relay=smtp1.wanadoo.co.uk [193.252.22.158]


I'm getting really annoyed with this and want to stop it. 9 times out of
ten,  the recipient is a false address anyways.

Is there a way to stop this in sendmail? I know you can do it in postfix,
but im not sure how to do it in Sendmail.

I appreciate it.

-Jason


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