What is the difference between ports 465 and 587?
SMTP protocol: smtps (port 465) v. msa (port 587) Ports 465 and 587 are intended for email client to email server communication – sending out email using SMTP protocol. Port 465 is for smtpsSSL encryption is started automatically before any SMTP level communication. Port 587 is for msaIt is almost like standard SMTP port. MSA should accept email after authentication (e.g. after SMTP … Read more