We have dedicated server running with OS Ubuntu-14. Cpanel : plesk 12, currently running wordpress with php7.0.9, apache2. Installed postfix mail server and IMAP/POP3 server : Courier-IMAP. We have 5 IP's
We require to setup email server on our dedicated server so that we can send newsletter directly and not rely on third party services. The setup should be such that the domainkey is from our servers and emails received are not detected as spam.
We already are using email service from this server but have not tried bulk mailing as we do not want to risk getting IP blocked, and would prefer to do it properly with all security and spam settings perfect.
We would prefer using wordpress directly to send mails (using newsletter plugins) if that is possible.