On 2022-10-21, Kai 'wusel' Siering via mailop <[email protected]> wrote:
[ in reply to a poster who had pain setting up new mxes ] > To stay ontopic here, the question is: _why_ were you getting "blocks left > and right"? And what were they? > > Was it a "fresh & clean" IPv4 address or one that had been abused in the > past? What did the RBL checking tools tell you about that IP? > > Did the IP belong to an ISP that people that have to deal with remote abuse > do wrinkle their nose at? > > And, most importantly: did you have to contact any postmaster to get that > IPv4 address, with matching PTR and A records, proper SPF and DKIM entries, > whitelisted to access their MXes at all? Yes. In the last 18 months, I've had cause to move both my primary and secondary MXes to different VPS providers. For both of them, Microsoft had the addresses on their internal blocklist. In both cases, the addresses themselves had no history, but were on the same /24 as hosts that did have a history. In both cases, I successfully jumped through the Microsoft hoops, and got them unblocked. This required not just being compliant, but providing proof of purchase and date of purchase of the addresses. It took a few days and three or four emails each time. Gmail is also a bit sensitive, but in my experience can be assuaged purely mechanically by carefully following all compliance requirements, including the ones I wouldn't otherwise bother with. Which is just as well, because there's no known way of contacting a human at Gmail, whereas Microsoft give you a real human after the first escalation. Currently neither I nor any of my users have any t-online.de correspondents, so I haven't tried dealing with them. _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
