Help needed! Repeatedly blacklisted by Brightmail
My domain's IP (ccgenie.com / 220.127.116.11) has been black-listed by Symantec three times during the last month, preventing my application from sending emails to hotmail.com and live.com. Every time I was able to un-list using the IP reputation tool at http://ipremoval.sms.symantec.com/lookup/ but nevertheless my service was disrupted for several hours.
I have run my domain IP and email headers through checkers like http://mxtoolbox.com/ and http://www.dnsstuff.com/ and found no problems. My website runs a perfectly legitimate business application that only sends a few dozens emails per day, and only to opt-in users.
Is there a way I can prevent this from happening again?