[mailop] Tiscali / Talktalk Content deferred (TT991)

Afternoon, Any Talktalk / Tiscali admins about or recommendations for contacting? We're seeing lots of deferred, ( TT991 ) messages when trying to deliver email. ~50% goes straight through and the other 50% is taking 12-24 hours to be delivered. Cheers, Duncan

Re: [mailop] Intentionally vague SPF records.

I’ll +1 to Jethro’s comments. NCSC will give you free DMARC reporting. We’ve done as Strathclyde and pushed services out into subdomains. The top level domain is just us and specific suppliers used for official comms. It wasn’t too painful in the end but we spent a lot of time in report only