On what port does mail go to ms exchange?

Question

Information Security

Before the advent of rpc over http, messages in ms exchange mail were transmitted via rpc via mapi, but I encountered the fact that there were no mail messages in rpc via mapi as such.
Can messages reside on port 102 in x.400? Where to look?)
I am attaching a link to the ports of this service https://www.prolateral.com/help/kb/outmail/522-wha...
The PS server was created at home ms server 2012 r2 + ms exchange 2010

Answer 1

Isn't SMTP 25 and/or SMTPS 587 port?
What are we talking about? Incoming/outgoing mail or an Exchange client/server connection?
In the second case - who is the client, where does it come from?
Well, to the heap - what do you have configured in the connectors in the Exchange itself? What is configured in DNS?
Did you run Remote Connectivity Analyzer or MXToolbox to check?
PS If I remember correctly, X.400 was cut out of Exchange many years ago...

Answer 2

EAS, mapi, ews, imap4, pop3, smtp: https://docs.microsoft.com/ru-ru/Exchange/plan-and...
Well, all sorts of cloud connectors.
See what ports are open on the server.