|Subject:||TCP/IP ports required by Xeams|
|Creation date:||12/14/15 4:35 PM|
|Last modified on:||8/6/21 10:55 AM|
||Required||IN/OUT||SMTP traffic. This is used to receive and deliver emails to other servers on the Internet.
||DNS traffic. Xeams will try to send a UDP query to the DNS server. If UDP does not work, a TCP request will be send.|
||Required||OUT||Xeams connects to our web server to fetch rules and program updates. If out-bound port 80/443 is blocked, your copy of Xeams won't be able to patch itself with new updates.|
|110||Optional||IN/OUT||In-bound port should be open if users are using POP3 to fetch their emails. Out-bound port should be open if you are using the POP3 fetcher.|
|143||Optional||IN||Required if IMAP is enabled.|
|995||Optional||IN||Required if POP3 server is enabled in SSL mode.|
|993||Optional||IN||Required if IMAP server is enabled in SSL mode.|
Often users ask us if they can change these port numbers because their ISP blocks certain ports, for instance, TCP/25. Before you change these ports, you have to ask who is connecting to them, which boils down to two categories:
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