Jim Ramsay <[EMAIL PROTECTED]> writes:

> I have just put the following near the top of my incoming filter:
>
> headers "Received-SPF: pass" accept
> headers "Received-SPF: fail" hold

I'll try this too, mainly so I can see if SPF is growing in popularity
(to date I've not received a message with a Received-SPF header).

> qpsmtpd has some other neat tricks as plugins that I hadn't thought of:
>
> - Reject any email from a "yahoo.com" address if the client uses an
> SMTP HELO yahoo.com (as real yahoo servers never use just "yahoo.com,
> but a real SMTP server)
>
> - Ensure the sender's email domain is resolvable (old trick, but
> qmail-smtpd didn't do this)
>
> - Check a rhsbl like dsn.rfc-ignorant.org
>
> - Disconnect if the client does too many (# configurable) unknown SMTP
> commands
>
> - Check for an "Early Talker" that starts sending data before the
> server says Hello

Yup I'm doing all of these with Postfix and it really makes TMDA's
life easier.
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