If I configure my locally hosted SMTP server to only accept SMTPS connections (secure SMTP port 465/587), how much mail will I lose because sender(s) don't support sending on SMTPS?
Are the major mail providers fully complaint of SMTPS on 587?
If I configure my locally hosted SMTP server to only accept SMTPS connections (secure SMTP port 465/587), how much mail will I lose because sender(s) don't support sending on SMTPS?
Are the major mail providers fully complaint of SMTPS on 587?
Port 587 is the submission port for clients to submit mail for delivery. Other SMTP servers won't send email to you on port 587-- they use port 25.