AY Mail 2. Any Edition
You can verify addresses before you send.
AY Mail verifies addresses by initiating mail transfer to the
recipient and then aborting immediately after the server
confirms the validity of the recipient. AY Mail does the verification
very efficiently, using 16 simultaneous threads.
This method will reveal
80 to 90% of the undeliverable addresses. Some of the undeliverable
addresses may not be revealed. Also, there is a very small chance that
good addresses may be marked as bad.
How to verify addresses