I've been facing an issue with getting a bounce back when trying to send texts via Verizon's email-to-SMS gateway. The message reads: "552 5.2.0 blocked AUP#BL." I've done my homework and checked all the usual suspects—my mailserver's IP isn't listed on any blacklists, and my messages pass tests with flying colors. However, it seems like the folks at cloudfilter.net, which manages Verizon's spam filtering, operate with a separate blacklist for each customer. I'm using a Comcast Mobile number (which is a Verizon MVNO) and can't directly communicate with Verizon representatives since I don't have their specific service. Reports suggest that getting off the blacklist is nearly impossible. Has anyone successfully navigated this situation? What steps did you take?
1 Answer
It sounds like you're in a tough spot. Things are changing quickly in the SMS game, especially with AT&T dropping support for email-to-SMS gateways. A lot of carriers are tightening their rules. I heard that Verizon isn’t accepting messages from non-cell numbers anymore either, which is frustrating for folks like online system admins who rely on that feature for monitoring. Just a heads up, you might want to prepare for a future where you can’t count on these gateways.
I totally agree! It's going to be a hassle for businesses that rely on SMS notifications. They really need to rethink their strategies, or they risk losing a lot of business customers.