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Re: Checking restrictions for client and sender
From: mouss (usebsdfree.fr)
Date: Thu Sep 14 2006 - 15:48:51 CDT
> I've got a bit confused with smtpd_client_restrictions and
> If I understand right, first checks restrictions for client when it
> connects to postfix, therefore there's no
> MAIL FROM yet. So if rule results in reject, no other checks done.
In the default setup (smtpd_delay_reject = yes),
client/helo/sender/recipient checks are performed after (each) RCPT TO,
not before. see the docs for why this is the case.
> Second checks for text in MAIL FROM command.
> Is it possible to block e-mails from some IP/domains except whitelisted?
yes, but it's a bad idea to whitelist senders, as they are easily forged.
if you post your current config and say what problem you are trying to
solve, you'll get better recommendations.