204580Re: To all of You who use: reject_non_fqdn_hostname and reject_unknown_hostname
- Sep 1, 2006Tony Earnshaw wrote:
> fr den 01.09.2006 Klokka 10:19 (+0200) skreiv o2 - Marcin Wasilewski:Good advice here. You could to have a look at your own previous logs and
>> Actually I use:
>> smtpd_helo_restrictions =
>> check_helo_access hash:/etc/postfix/db/helo_access
>> and I would like to enable
> Do that, but use a whitelist for genuine maverick non-fq clients (idiot
> Windows and non-savvy Unix mailadmins). Keep a good eye on what's being
> rejected (logs or Mail Delivery System mail to postmaster).
> Don't do that in any event. Too much genuine mail will be lost.
>> but I wonder how many false-positives it gives..
> Both give false positives, but reject_unknown_hostname gives far and
> away most.
write a little script to grep for accepted mails, the client-name and if
the mail was spam or not.
That would tell you for your exact situation how many false positives you
would have to endure.
From my own experience I can tell you that the size of the company will
not mean the mail system was set up in a sensible way.
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