topic Re: Mailserver is on TalkTalk internal blacklist in Email

Mailserver is on TalkTalk internal blacklist

agenturadler — Thu, 23 Feb 2023 11:15:49 GMT

Hi all,

I'm the owner of a web agency based in Germany. We maintain several server for our clients and ourself and have the problem, that our mailservers are on the internal TalkTalk blacklist.

<xxx@tiscali.co.uk>: host mx.tiscali.co.uk[62.24.139.42] refused
to
talk to me: 554 cm7gb1 mx.talktalk.net UQ3Bp15Qvh2Vt IP Blacklisted
(TT103)

Our mailservers have the IP addresses

89.58.60.178
89.58.61.62

How can I get this removed from the internal TalkTalk blacklist?

Thank you for your help.

Best regards,

Christian

Re: Mailserver is on TalkTalk internal blacklist

Ady-TalkTalk — Thu, 23 Feb 2023 11:21:55 GMT

Hi Christian, I've alerted our email team to this for you. Unfortunately, we don't and never have had a postmaster email address to allow the ESPs to contact the mail team directly.

Ady

Re: Mailserver is on TalkTalk internal blacklist

Gondola — Thu, 23 Feb 2023 11:52:50 GMT

Your IP addresses are on a non-TalkTalk blacklist because of hosting spammers. i.e. the IP addresses have a poor reputation and the fix is to stop spam at source.

Reason for listing - Your ISP NETCUP-AS netcup GmbH, DE/AS197540 is UCEPROTECT-Level3 listed because of a spamscore of 59.

Re: Mailserver is on TalkTalk internal blacklist

agenturadler — Thu, 23 Feb 2023 13:19:24 GMT

I know about this entry.

I hope, TalkTalk is NOT using this Level3 list. No reasonable provider should use this Level3 list due to the fact, that this list uses IP ranges and not only one single IP address and the provider has a very strange business model.

Furthermore, the first undelivered mail message from TalkTalk was sent in a time, where this Level3 list entry was not present. In this time, there was no entry on an external blacklist.

Re: Mailserver is on TalkTalk internal blacklist

Gondola — Thu, 23 Feb 2023 13:39:13 GMT

I am well aware that the UCEPROTECT Level 3 listing does receive criticism because of the blocking of whole ranges of IP addresses even though only one IP address and maybe only one of your customers is sending spam. But that's one spammer too many. I'm also aware that the business model of UCEPROTECT Level 3 does receive criticism because they only support delisting if contributions are made.

If TalkTalk were blacklisting even before the IP addresses were listed by UCEPROTECT Level 3 then that's pretty much confirmed that TalkTalk Mail users have marked some mail as unwanted spam and subsequently spam has been detected by UCEPROTECT as well.

Have you identified the source of the spam from the first undelivered mail message and removed the spammer from your servers?

This response is not an official TalkTalk response but is intended to help you eliminate spam from arriving at TalkTalk's mail servers. An official response will follow.

Re: Mailserver is on TalkTalk internal blacklist

agenturadler — Thu, 23 Feb 2023 13:47:48 GMT

The messages that are blocked are no spam messages. Those are business communication from one of our clients to one of its customers.

We have no spammers on our server. The listing on the Level3 list is not because of our IP address - if so, our IP address would be also on UCEPROTECT Level 1 (and that's not the case).

My question: ist TalkTalk using the UCEPROTECT Level 3 list?

Is it just possible to remove our IP addresses from the TalkTalk blacklist as it is possible at any other mail service provider like Google, Microsoft, TrendMicro etc. that have special websites with a form to request such removal?

Re: Mailserver is on TalkTalk internal blacklist

Gondola — Thu, 23 Feb 2023 13:52:44 GMT

TalkTalk's Email Admins have been notified by Ady-TalkTalk of the blacklisting and they'll respond in due course, I hope, with the reason for the blacklisting.

Re: Mailserver is on TalkTalk internal blacklist

agenturadler — Tue, 07 Mar 2023 09:59:18 GMT

Are there any news regarding this topic? Unfortunately, I haven't received an answer from TalkTalk, yet.

Re: Mailserver is on TalkTalk internal blacklist

Gondola — Tue, 07 Mar 2023 10:05:09 GMT

You would know before anyone in TalkTalk land would tell me.

Re: Mailserver is on TalkTalk internal blacklist

agenturadler — Tue, 07 Mar 2023 10:08:26 GMT

My question was not addressed at you directly. This was a general question because it seems, that there is no progress on TalkTalk side.

Re: Mailserver is on TalkTalk internal blacklist

Ady-TalkTalk — Tue, 14 Mar 2023 06:22:30 GMT

Hi agenturadler, I've had no contact from our mail admins. I've sent a chaser to try and elicit a response.

Ady