on 22-07-2021 11:53 AM
We are an ESP and we are currently experiencing an issue when trying to send to a business domain that uses TalkTalk as their provider, we receive the following bounce back message:
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on 23-07-2021 10:00 AM
Hi mhayes, I'm pleased to see that you've had all the help you need from Gondola.
If you find you need help again you know where to find us.
on 22-07-2021 01:05 PM
And where exactly does TalkTalk figure in this? I don't see any TalkTalk involvement in aramco.com so I'm guessing that you have in your mail list some rogue TalkTalk managed email addresses that shouldn't be there. My advice is to clean the mail list.
msgfocus.com has an SPF record that includes a wide range of IP addresses. So, if from the 184.108.40.206/22 range you're only getting problems with the IP addresses you specified it might be wise to restrict the range in case someone is spoofing your mail. You don't appear to be using DMARC so wouldn't necessarily get any feedback on mail spoofing.
on 22-07-2021 12:43 PM
The domain is aramco.com 🙂 . When trying to send to the domain via the above IP's we receive the above bounce back message each time, however when we send to the aramco.com domain outside these Ip's we do not get the bounce back message.
on 22-07-2021 12:12 PM
When you say you're sending to a business domain what domain is that? TalkTalk Business (TTB) no longer operate a business mail domain, just three legacy domains and there may still be some personal domain names still being hosted by a third party.
But on the bounceback error message. This is very specific. Your mailing list includes addresses that are no longer in use. The advice from me would be to clean the mail list of all addresses that are no longer active or that have unsubscribed or blocked your mail. Wait 24 hours for any rate limiting to be relaxed and then resume sending to valid addresses only.