Re: [CentOS] postfix - reject of incoming mail due to helo check??

On 02/02/2012 10:08 PM, Rob Kampen wrote:

Final question for the list - does anyone use "reject_unknown_client" - it has given me the most grief with legitimate clients that have poorly administered domains.

My restrictions are:

permit_mynetworks permit_sasl_authenticated reject_unknown_hostname permit_mx_backup reject_unauth_destination reject_non_fqdn_hostname reject_non_fqdn_sender reject_non_fqdn_recipient reject_unknown_sender_domain reject_rbl_client sbl.spamhaus.org dnsbl.sorbs.net

and I am very happy with them. SPAM is very limited, and false positives are rare. I usually send worning mail to the admin of the domain in question.