Issue Accessing outside mails to lan users from Microsoft Exchange Server
Issue Accessing outside mails to LAN users from Microsoft Exchange Server can send the mails but cant receive pls tel me the rules and port forwarding for Microsoft exchange server .
Your question is not answerable without more information. Specifically, what version of Exchange? What are you trying to provide access to? IMAP, POP, OWA, RPC over HTTPS?
I can assist, or do it for you, but I charge for my time.
Ok…I just reread your post.
You need to allow SMTP inbound from the Internet.
There are probably other configuration items you need to complete as well.
This ain't MS support forum. => https://social.technet.microsoft.com/Forums/