I have two applications that run on windows that return this error when I try to use my postfix relay to send mail.
An error occurred while trying to send the test email. 504 5.5.2 : Helo command rejected: need fully-qualified hostname I have added the IPs to mynetworks, but Postfix is requiring a FQDN before allowing the server to relay. The servers have a PTR. Does anyone know how to get Windows to send the FQDN when connecting to a relay? Or is there a simple way to make an exception in Postfix? I'm guessing it gets denied here: smtpd_recipient_restrictions = reject_invalid_hostname, reject_non_fqdn_hostname, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, permit_mynetworks, reject_unauth_destination, reject_rbl_client cbl.abuseat.org, reject_rbl_client sbl.spamhaus.org, reject_rbl_client pbl.spamhaus.org permit Thanks, James
