[CentOS] Postfix smtp_recipient_restrictions causing mail to fail

Logan Moore logan at alloynet.co.nz
Fri Mar 13 09:08:57 UTC 2009

Logan Moore wrote:
> 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
>> _______________________________________________
>> CentOS mailing list
>> CentOS at centos.org
>> http://lists.centos.org/mailman/listinfo/centos
> 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 
> blocked.
> smtpd_recipient_restrictions = permit
> This seems more than a tad wrong
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos

OK, now we are getting somewhere. You can't do anything without 
specifying reject_unauth_destination, and specifiying that alone works 
fine, so I will work my way back up to the full list of restrictions 
from that and see where it breaks.

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