Forum Discussion

detrain's avatar
detrain
Joining in
11 months ago

Cannot connect to Namesco SMTP server

Since Monday morning I have been unable to submit e-mail to Namesco's SMTP server us2.smtp.mailhostbox.com (which my personal domains have aliases for).  This problem affects all device connected via my Virgin Hub3 - I've tried 3 computers with wired ethernet connections and my iPad and phone which are both on Wifi.

In the Windows command prompt I have determined I am unable to telnet to this server on any of its SMTP ports 25, 465 and 587, using any of its four IPv4 addresses returned by nslookup.

I can send emails using the same account settings on my phone when I turn of the Wifi so it uses its 4G SIM rather than Virgin Media.  I can also send emails via my Virgin Media Hub3 and an account setup to use its own server smtp.ntlworld.com and another server managed by a workplace.

I assume either my Hub3's WAN IP address or Namesco's SMTP server is on some blacklist.  I have contacted Namesco's support and they have said it's not at their end.  I've rebooted my Hub3 twice but both times it has come back with the same IP address.

19 Replies