E-Mail Service Related Port Numbers and Descriptions

popowich

EQ Forum Admin
Staff member
The following is a list services that can be related to e-mail, their port numbers, and their service descriptions.

smtp 25/tcp
smtp 25/udp
domain 53/tcp # name-domain server
domain 53/udp
http 80/tcp # WorldWideWeb HTTP
http 80/udp # HyperText Transfer
pop2 109/tcp # POP version 2
pop2 109/udp
pop3 110/tcp # POP version 3
pop3 110/udp
imap 143/tcp # Interim Mail Access Proto v2
imap 143/udp
qmtp 209/tcp # Quick Mail Transfer Protocol
qmtp 209/udp # Quick Mail Transfer Protocol
imap3 220/tcp # Interactive Mail Access
imap3 220/udp # Protocol v3
https 443/tcp # MCom
https 443/udp # MCom
submission 587/tcp # mail message submission
submission 587/udp # mail message submission
imaps 993/tcp # IMAP over SSL
imaps 993/udp # IMAP over SSL
pop3s 995/tcp # POP-3 over SSL
pop3s 995/udp # POP-3 over SSL​
 
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