Seems like Verizon is blocking Dreamhost email?


#1

Suddenly having trouble w/ sending emails from a Verion FiOS location.

For last year or so have used 587 w/ STARTTLS with no issues. Always worked fine.

Suddenly can’t connect at all from Verizon. Configuration unchanged on client side, but all attempts to contact that host will timeout. But fire up my VPN to tunnel the traffic and it works fine. And exact same client PC works fine in dozens of other locations / networks with same config.

Can’t find anything at all in my router that would indicate an issue. Config unchanged from when it was working fine.

Tried 465 w/ SSL/TLS and same result - works great via tunnel, blocked on Verizon.

Incoming mail (IMAP) seems to work OK although that traffic seems slowed down and will time out, while works perfectly and in a flash again via the VPN tunnel.

Recap:

Destination SMTP server = a Dreamhost server
587 / STARTTLS fails to connect via Verizon, fine via VPN and same client hardware/config on other networks
465 / SSL/TLS fails to connect via Verizon, fine via VPN and same client hardware/config on other networks

Any suggestions? Has Verizon suddenly blocked Dreamhost? Or is it a Comcast/Verizon interface somewhere? Tracert suggests that the traffic has to hit a few Comcast hubs before it gets to Dreamhost. Tracert completes fine from VPN/other but hangs from Verizon so theres def a block there.


#2

Hello!

We’ll need you to submit a support ticket for this so our team can investigate if your mail is indeed being blocked by Verizon. Feel free to provide the above details, and please make sure to provide the full text and header information (including the original outgoing message, from the original bounceback/NDR).

Thanks!