On Tue, 2024-01-02 at 17:32 +0000, Justin Krejci via mailop wrote: > When a Verizon mobile user sends a text to an email recipient, I understand > it goes through some mail gateway system that converts the message to a > standard email and I think uses the @vtext.com as the sending domain with > some composition of obfuscated user data before the domain. We are receiving > many reports of people getting "connection refused" errors when a Verizon > user is sending with this method; see below for error message. > > Is there anyone on the Verizon mail admin team we discuss/troubleshoot with > please? > > Our receiving SMTP server is definitely not refusing connections so either > tcp traffic is getting blocked before arriving to us or the wording of the > error message is not accurate. But without knowing what all the sending IP > addresses are for sure, it is difficult to even troubleshoot. We are > attempting to run a packet capture on the IP addresses listed in the SPF > record for vtext.com but that uses assumptions which may be incorrect. >
Wild guess: a few weeks ago we were getting reports of missing SMS-to- email messages because the Verizon servers involved were blacklisted. If you have something like fail2ban running, maybe you're dropping them at the firewall for some kind of abuse? _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
