Microsoft Outlook Question:

For networks, a port means an endpoint to a logical connection. The port number identifies what type of port it is. Here are the default email ports for: -

POP3 - port 110
IMAP - port 143
SMTP - port 25
HTTP - port 80
Secure SMTP (SSMTP) - port 465
Secure IMAP (IMAP4-SSL) - port 585
IMAP4 over SSL (IMAPS) - port 993
Secure POP3 (SSL-POP) - port 995