I'm looking for a bulk email validation tool to parse a list of 60K email addresses. Our company sends out 8 Million email newsletters a month via our mailing list software - MDAEMON. MDAEMON ships with a bad email address validator but I'm not quite comfortable with its results as it captures returned email addresses with SMTP errors of 500 and above. (We want to keep emails that return a Full Mailbox error or bounce backs that see us as SPAM)
To further prune the list, we use Advanced Email Verifier. But I tested a random sample of this list and found a couple emails to be valid.
Since our company relies heavily on traffic from our newsletters, I am wondering what other Windows-based bulk email verifier tools are out there?