i have a Postfix 2.9.6 running on Ubuntu with the following configuration
https://gist.github.com/anonymous/400fb4afa05e18c6da2b and i'm suffering the following issue where a valid client tries to send an email to itself. Most of my clients does not have a valid FQDN as hostname but as i understand that's not a problem because of
permit_sasl_authenticated but i don't know why the following process ends up like this:
Out: 220 mail.isp.es ESMTP Postfix In: EHLO NoFQDN-Host Out: 250-mail.isp.es Out: 250-PIPELINING Out: 250-SIZE 10240000 Out: 250-ETRN Out: 250-STARTTLS Out: 250-AUTH PLAIN LOGIN CRAM-MD5 DIGEST-MD5 Out: 250-ENHANCEDSTATUSCODES Out: 250-8BITMIME Out: 250 DSN In: MAIL FROM: <email@example.com> Out: 250 2.1.0 Ok In: RCPT TO: <firstname.lastname@example.org> Out: 450 4.7.1 : Helo command rejected: Host not found Session aborted, reason: lost connection For other details, see the local mail logfile
The following are my restrictions:
smtpd_client_restrictions = reject_rbl_client sbl.spamhaus.org, reject_rbl_client blackholes.easynet.nl, reject_rbl_client dnsbl.njabl.org smtpd_data_restrictions = reject_unauth_pipelining smtpd_end_of_data_restrictions = smtpd_etrn_restrictions = smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, warn_if_reject reject_non_fqdn_hostname, reject_invalid_hostname, permit smtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_pipelining, permit_mynetworks, reject_non_fqdn_recipient, reject_unknown_recipient_domain, reject_unauth_destination, warn_if_reject reject_unknown_helo_hostname, permit smtpd_restriction_classes = smtpd_sender_restrictions = permit_sasl_authenticated, permit_mynetworks, warn_if_reject reject_non_fqdn_sender, reject_unknown_sender_domain, reject_unauth_pipelining, permit
Does anyone knows why that client is not able to send an email while others does?