02-17-2012 02:34 AM
02-17-2012 10:31 AM - edited 02-17-2012 11:13 AM
Welcome to the Norton Community Forum!
SMTP Port 587 uses TLS (or SSL) authentication and is already protected by Norton.
If your email is working on both outbound and inbound, there would be no need to change anything, IMO.
Are you having a problem sending and/or receiving email?
Now, if you are concerned about email security, please don't be.
Norton 360 will protect you from any problems in realtime via the Auto-Protect mechanism when receiving questionable attachments, or even sending potential threats.
Does this help answer your question?
02-17-2012 11:01 AM - edited 02-17-2012 11:02 AM
Port 587 is an SSL-encrypted port that cannot be monitored. That is why you are unable to add it to the Protected Ports list. Norton only supports non-encrypted POP3 and SMTP ports.
02-17-2012 11:11 AM - edited 02-17-2012 11:15 AM
Just a footnote to SendOfJive's post.
Here's an article that explains Port 587 for your interest -