Mr Salteena is not quite a gentleman on Nostr: npub1trdnq…gussx IIRC they have a wholly owned subsidiary out in Petone that could ...

npub1trdnqrfstufc45awha43p6xy2n0v6czuhapzh4r09hap08dg0c6s9gussx (npub1trd…ussx) IIRC they have a wholly owned subsidiary out in Petone that could be doing this, what used to be Datamail that did direct marketing and bills and so forth. But internally they are using cloud hosted proprietary mail.... as Dave noted, not clear that they would do this pivot in any way other than whitelabelling an offshore service.