Dear, I have a Postfix mail server in my company and a person from here is asking to send massive mails to a list of 15.000 recipients in order to announce periodically our company's news.
I think with've got the risk that our mail server may be considered a spam server, being included in some spam blacklist as Spamhaus and other. I ask you: what is the recommendation to send legal massive mails ??? What is the better solution if I have to do that with Postfix ??? Thanks a lot Alejandro Facultad