From: Barry Berger (barrythisblueplanet.net)
Date: Fri Mar 03 2006 - 06:09:30 CST

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*hmm*....but I do have that (smtpd_reject_unlisted_sender = yes ) in my
main.cf which is part of why I am puzzled....so I thought perhaps I had
a conflict that might be canceling that setting.

I suddenly have a funeral to attend out of town and won't have access to
this machine for nearly a week so I'll keep reading and hope I've become
more enlightened when I get back. Thanks again for the help.

mouss wrote:

you didn't read the URL or did you just missed:

------------------
* As of Postfix version 2.1, the SMTP server also rejects unknown sender
addresses (i.e. addresses that it would reject as unknown recipient
addresses). Sender "egress filtering" can help to slow down an email
worm explosion. This is controlled by the smtpd_reject_unlisted_sender
configuration parameter.
----------------
the "keyword" above links to:
http://www.postfix.org/postconf.5.html#smtpd_reject_unlisted_sender

An alternative is to use reject_unlisted_sender in smtpd restrictions.

PS. don't top post

Wietse Venema wrote:
> Barry Berger:
>
>> Thanks,
>> I had gleamed through this section before but perhaps didn't read
>> hard enough...I'm back at it now. However, my server is rejecting mail
>> for unknown 'recipients' so I wanted to be clear - what is happening is
>> that my real and valid email accounts are receiving spam FROM
>> non-existent accounts in my domain. It is only the 'sender' that is invalid.
>>
>
> Specify "smtpd_reject_unlisted_sender = yes" in main.cf.
>
> Wietse
>
>

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