Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.
One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
|Exec Database for Exchange||5||53|
|Unable to Send As mailbox user - Office 365||3||55|
|How to change safe sender list in Outlook for all O365 users and a specific domain?||3||46|
|Exchange Server 2003 Supportability Matrix||3||20|
Join the community of 500,000 technology professionals and ask your questions.