>> I've been using smtps on port 465 for sending mail but I read it's >> deprecated so I'm trying to switch to submission port 587. >> >> With 465 I was using the "Connection security: SSL/TLS" setting in >> Thunderbird, but after switching to 587 I can't send mail unless I >> change it to STARTTLS. Can anyone explain this? > > yes because it is STARTTLS > 465 is smtp over ssl and NOT STARTTLS > > we provide both on smtp/imap/pop3 because all of them > having a dedicated "over ssl" port and STARTTLS over > the standard-port if configured > > SMTP unencrypted / TLS: 587 > SMTP over SSL: 465 > POP3 unencrypted / TLS: 110 > POP3 over SSL: 995 > IMAP unencrypted / TLS: 143 > IMAP over SSL: 993
Is IMAP over SSL on 993 deprecated in favor of using STARTTLS on 143? I just read that Squirrelmail doesn't support STARTTLS, so I must continue to use smtps 465 in order to use Squirrelmail? - Grant
