Hello, I send emails ISPConfig are sending spam. I checked the reverse DNS of my IP. Can be any configuration of main.cf ? Sorry my bad english. Regards, Caio.
1) Does the hostname of the server exist in dns? 2) Is the reverse record of the IP address pointing back to this hostname. 3) Is this hostname used as myhostname and mydomain in postfix main.cf? if 1-3 are ok, then you can add a spf record for your domain in the dns zone of the affected email domain.
Re Hi, till. Thanks for your reply. 1) YES 2) YES 3) myhostname = domain.com mydomain = domain.com I need to put in mydomain and myhostname the 'server.domain.com' ? Caio.
Yes. the domain that you use for email addresses (domain.com) should not be in the main.cf file on a virtual user setup like it is used by ispconfig. Adding a spf record in the dns zone of domain.com might be a good idea as well.
