Mail Server Ports

If you are working in field IT, you will know what mail servers are and what protocols they use. Here are the protocols and their port numbers for your reference:

Plain Text:
POP3 110
IMAP4 143
SMTP 25
Encrypted Protocols:
POP3 (over SSL) 995
IMAP4 (over SSL) 993
SMTP (over TLS) 465 or 587

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