On 2010-05-21 4:04 PM, Phil Howard wrote: > OK, I can do SMTP over TLS/SSL on port 465 (with a slight and unlikely > risk of usage collision). So what is port 587 for?
? This question has been answered at least 3 or 4 times in this very thread. port 465 is for SMTP+SSL this is DEPRECATED and has been for a long time port 587 is for SMTP+STARTTLS this is the designated SMTP SUBMISSION port The submission port should always be used instead of port 465 unless you must support older clients like Outlook Express and older versions of Outlook that will only do SMTP+SSL over port 465. -- Best regards, Charles
