Why my IP's getting Block by AT&T
I'm doing mailing process to my subscribers using AT&T ISP,but few days ago i have faced block issues in my side ,but i dont know why AT&T blocked my IP's and i seen in error message this mail id "email@example.com".I sent mail twice for this ID and i didn't get any further response from their side and still my ip's not unblocked.So i kindly request please anyone help me to fix this issue & give some ideas to unblock my ip's
ACE - Expert
3 months ago
Make sure your mail server isn't an open relay. Make sure you have SPIF, TKIP, etc., etc. set up for it. Make sure you have a valid PTR record. Use MXTOOLBOX.COM for help. Check various and sundry RBLs to ensure you're not on them (MXTOOLBOX has a section for this). Get yourself off of any you find yourself on. Follow good mail list hygiene and other applicable industry and legal standards.
Once you've done all that, send another e-mail to that address making it look like it was written by a legitimate business person vs a spam bot. Discuss your history with your IP address, i.e. how long you've had it, when you started using it as a mail server, any incidents where you've had an open relay or accidently allowed SPAM to be sent, etc. Aver that you will follow industry standard practices to not send or relay SPAM. Cross your fingers. Light a candle. Bow to the east (or west, as appropriate).