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i’m having a small problem with correctly setting my postfix server as to not be regarded as a spam server.
There should be some switches and simple configuration to do that, but i cannot find that. Can anybody point to an online resources that indicated on how to whitelist my server ?
Thanks for recommending our DNS tools, we would like to echo what Gryphius stated about having correct DNS records for MX, PTR and SMTP Banner. If any of these are incorrect it can result in major mail problems. If your PTR and SMTP Banner do not match or resolve to the same FQDN most major ISPs will either mark your message as spam or disallow the message completely.