Postfix Mail Delivery SMTP Troubleshooting

To avoid delay in emails, specially for gmail. Just find which MX is working by issuing below commands: # dig mx gmail.com # telnet mx-IP/name 25 upon success, just see the name of first mx tried from /var/log/maillog and add an entry in /etc/hosts file. In my case, the entry is given below: # vim…
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