[CentOS] Postfix smtp_recipient_restrictions causing mail to fail

Fri Mar 13 09:00:08 UTC 2009
Logan Moore <logan at alloynet.co.nz>

Logan Moore wrote:
> Hi All,
> I'm currently playing with smtp_recipient restrictions to try and knock 
> some of this spam on it's head. On my old debian server, I was using 
> this and successfully filtering out at least 90% if not more of all spam 
> emails which was great. I didn't even need spamassassin.
> However, trying to do the same thing on my new CentOS based server isn't 
> working. With the following enabled, nothing comes through from the 
> outside world.
> Can anybody see where I've gone wrong. I can't fathom why this would 
> block all incoming emails from the web.
> smtpd_recipient_restrictions =
>      permit_mynetworks,
>      permit_sasl_authenticated,
>      reject_invalid_hostname,
>      reject_non_fqdn_hostname,
>      reject_non_fqdn_sender,
>      reject_non_fqdn_recipient,
>      reject_unknown_sender_domain,
>      reject_unknown_recipient_domain,
>      reject_rbl_client zen.spamhaus.org,
>      permit
> Thanks,
> Kind regards,
> Logan Moore
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Weird. If I comment out the smtpd_recipient_restrictions, that lets 
email through, so I tried removing restriction, restarting postfix and 
then sending an email to check if emails start working. Email didn't 
start working until I removed the smtpd_recipient_restrictions all 
together. Even the following would result in all incoming email being 

smtpd_recipient_restrictions = permit

This seems more than a tad wrong