On 15.01.20 12:56, Sam Tuke wrote:
I noticed that newsletters which I receive from large firms are typically sent from servers which have port 25 closed.
I guess they are not mail servers. Not all servers have to receive mail. Many companies have different servers for incoming mail than for outgoing mail, webservers or whatever.
Is it common practice to close port 25 on bulk sending servers? Should we do this for Postfix servers which serve the same role? What's the advantage? Maybe the MTAs that such senders use are so customised as to be capable of only sending, not receiving, mail?
I have asked about very similar issue a week ago. Will bump. -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. 2B|!2B, that's a question!
