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.
|Exchange 2016 block top level domain||2||718|
|SPAM Filter for a small business||8||113|
|We're using Symantec Messagelabs - still getting tons of spam........will SPF record help?||5||76|
|bit defender blocks good applications||2||101|