Nigel Allen <[email protected]> writes:
> Customer of mine currently has their own in-house mail server. Machine runs
> CentOS 4.8 with Sendmail, spamassassin and mimedefang. RBL's are covered in
> sendmail.mc with spamhaus and SORBS.
>
> Can anyone think of any reason why this combination would not play nice if
> they also implement greylisting?
Nope.
> Any gotchas anyone is aware of?
Some providers, typically big ones (*cough* Telstra, Optus) tend to play
poorly with greylisting: they have a separate pool of senders if the first
attempt is not accepted, and can delay up to 24 hours before sending.[1]
Some greylisting tools have a set of exceptions for dealing with this, others
don't. The later ... hurt more. :)
Daniel
Footnotes:
[1] Well, could, when last I managed a system with greylisting, about nine
months ago.
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✣ Daniel Pittman ✉ [email protected] ☎ +61 401 155 707
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