April 12, 2024


Change is the end result of all true learning

To Configure Mail Server We Need  SMTP, IMAP or POP3 :

SMTP – Simple Mail Transfer Protocol

IMAP – Internet Message Access Protocol


POP3 – Post Office Protocol Version 3

Generally In CentOS We Use Mainly Two Services:
Postfix – SMTP,
Dovecot – IMAP / POP3.

SMTP Uses Ports 25(Smtp), 465(Smtps), 587(Submission)
IMAP Uses Ports 143(IMAP) , 993(IMAPS)
POP3 Uses Ports 110(POP3), 995(POP3S)