You may also want to try asking this question on the "mailop" list.
Keith On 12/3/19 8:05 AM, Robert Fitzgerald wrote: > I’m looking to speak with a technical contact at BT regarding an IP > range of ours being blocked on their mail servers. I have tried their > 1^st line support but they would only direct me to Premium Mail who > weren’t helpful as I’m not a customer. Our subscriber with the BT > account was told to speak to us, so here we are but I’m unsure how to > reach the relevant team within BT to get our subnet whitelisted. Can > anyone shed any light? > > *Robert Fitzgerald* > Network & Systems Manager
