port fowarding - Exchange 2007 - trying to avoid being blacklisted
I'm a time warner cable residential customer. I have exchange server 2007 on Hyper-V. I'm about to open port 25 and start emailing away for test enviroment. What is the best way to avoid being blacklisted? I've been blacklisted twice, and I have to end up waiting 2 weeks to get off the blacklist. Any suggestions/settings I should make on my exchange server?
PTR record :- A Reverse DNS entry (FQDN) must exist for the delivering server and hostname should resolve to the Same IP address. The PTR record helps to identify the source of emails and authenticity of the source server.
Password Strength :- Password strength should be a strong combination of upper and lower case , characters .
Antivirus :- Should be updated .