topic Re: TalkTalk blocking access to company email? in Email

TalkTalk blocking access to company email?

prgb100 — Thu, 09 Mar 2023 14:11:03 GMT

Hi there,

Hopefully someone can assist - I have tried the live chat but the agent directed me here.

Until today everything has been working well, however this morning I found I could not connect to my company email either IMAP or Webmail, or cPanel for web hosting. This is only through TalkTalk - if I use 4G / 5G it works absolutely fine. TalkTalk seem to be blocking nebula.servers.prgn.misp.co.uk (31.170.123.89)

First I tried turning the TalkTalk router on and off - no joy. I then tried a factory reset of the router and still no joy.

I have spoken to the host provider and their systems are all running as they should be.

Please let me know if there's something else I can try. So far, all other web sites seem to load correctly.

Many thanks,

Peter

Re: TalkTalk blocking access to company email?

Gondola — Fri, 10 Mar 2023 12:11:44 GMT

If you mean you can no longer send company mail using the TalkTalk Mail servers then that is because TalkTalk is blocking port 25 because only secure mail from TalkTalk domains is permitted and that is authenticated by the Email address and password for the sending mail.

You will be able to use the incoming and outgoing mail server provided by your business mail hosting service. Let me know who that is or the business domain and I'll look it up to help you.

The website is indicating there may have been DNS changes and therefore it may simply be a DNS propagation delay issue. I just get https://nebula.servers.prgn.misp.co.uk/cgi-sys/defaultwebpage.cgi

Re: TalkTalk blocking access to company email?

prgb100 — Fri, 10 Mar 2023 13:27:13 GMT

Hi Gondola,

Thanks very much for the reply.

In response to where you note "You will be able to use the incoming and outgoing mail server provided by your business mail hosting service."

I am not able to. When I try to go to the page you seem to be able to reach,

https://nebula.servers.prgn.misp.co.uk/cgi-sys/defaultwebpage.cgi

I get the following:

This site can’t be reached

nebula.servers.prgn.misp.co.uk took too long to respond.

Try:

Checking the connection
Checking the proxy and the firewall

ERR_CONNECTION_TIMED_OUT

I am connected directly to the TalkTalk router, I have reset it to factory defaults. If you are using TalkTalk Internet and you are able to reach that page, why might I not be able to?

Thanks again,

Pete

Re: TalkTalk blocking access to company email?

Gondola — Fri, 10 Mar 2023 13:43:31 GMT

Clear your DNS cache maybe?

Re: TalkTalk blocking access to company email?

prgb100 — Fri, 10 Mar 2023 18:05:46 GMT

Hi Gondola,

Thanks again for getting back to me. I did try clearing the DNS cache, as you recommended. That didn't work, but it made me think that everything pointed to there being a DNS problem somewhere. I found this post: https://community.talktalk.co.uk/t5/Broadband/DNS-reset-or-flush/td-p/2639169

Though I'd tried turning the router on and off and giving it a factory reset, I hadn't turned it off for long. I turned it off for a few hours this afternoon and when I turned it on again, all is working again 🙂

Thanks so much - if you hadn't suggested the things you had, I wouldn't have got to this point.

Thanks again,

Pete

Re: TalkTalk blocking access to company email?

Ady-TalkTalk — Mon, 13 Mar 2023 13:36:06 GMT

Hi prgb100, Gondola won't see you wrong. Gondola provides the best advice to our other community members.

Ady