sendmail SMTP Authentication small problem
Paul Howarth
paul at city-fan.org
Thu Sep 23 15:11:48 UTC 2004
Rodolfo J. Paiz wrote:
> You can't enable SMTP-AUTH for all incoming mail at all, AFAIK, since
> sendmail will only request AUTH for requests to *relay*. Sendmail will
> not request AUTH for mail to be delivered locally.
>
> If you *can* require Sendmail to AUTH everything and everyone that sends
> mail to you, then you will only receive mail sent by your own users.
You could do this by using the "a" modifier in the DAEMON_OPTIONS for the MTA,
e.g.
DAEMON_OPTIONS(`Port=smtp, Name=MTA, M=a')
However, this would, as has been mentioned, prevent general reception of mail,
which is why it tells you not to do it in /usr/share/sendmail-cf/README:
Notice: Do NOT use the 'a' modifier on a public accessible MTA!
Paul.
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