Hi All, I'm having some trouble with PostFix on my server. I set up a simple email address: [email protected] Initially, I was able to send email from mail.yahoo.com and receive it successfully at this address. However, when I submitted my email address to other websites ( for confirmation of email purposes, similar to a forum email confirmation ) the emails did not come. Ever since, I've been playing with Postfix, and just now the a few of the emails arrived from Paypal.com (5 hours later), a service I was attempting to subscribe to. Now, though, emails from yahoo DO NOT come. Here's my /var/log/maillog for the emails that arrived 5 hours late: Code: Jan 18 21:01:02 cayenne postfix/smtpd: connect from outbound2.den.paypal.com[220.127.116.11] Jan 18 21:01:02 cayenne postfix/smtpd: disconnect from unknown[18.104.22.168] Jan 18 21:01:02 cayenne postfix/smtpd: 766A1F805E: client=outbound2.den.paypal.com[22.214.171.124] Jan 18 21:01:02 cayenne postfix/cleanup: 766A1F805E: message-id=<[email protected][email protected][email protected][email protected][email protected][email protected][email protected][email protected][email protected][email protected][email protected] And my Main.cf: Code: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix debug_peer_level = 2 home_mailbox = Maildir/ html_directory = no inet_interfaces = all mail_owner = postfix mailbox_command = mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = /etc/postfix/local-host-names mynetworks = 127.0.0.0/8 newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES sample_directory = /usr/share/doc/postfix-2.3.3/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtp_tls_note_starttls_offer = yes smtp_use_tls = yes smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_local_domain = smtpd_sasl_security_options = noanonymous smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem smtpd_tls_auth_only = no smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_session_cache_timeout = 3600s smtpd_use_tls = yes tls_random_source = dev:/dev/urandom unknown_local_recipient_reject_code = 550 Things I've already checked: 1. Server not on Black List 2. Httpd, Named, and Ispconfig_server are all up and functioning 3. Postfix and dovecot are up and functioning 4. I used the same config settings on another server without issues 5. Maildir is selected in Server->Settings 6. LocalServer is selected for www.mydomain.net 7. LocalServer is selected for co-domain mydomain.net 8. Entries for mydomain are present in virtusertable 9. Local-host-names file appears to be intact, but not 100% sure if the correct hostnames are specified... I think it may be a DNS problem - OR - something to do with the mail queue, but the fact that the message registers 5-6 hours late suggests a DNS or address issue... Thanks for any help!