If it were me, I'd probably investigate Kumo MTA, it's open source, good for bulk senders, and the peeps behind it are known members of the email community/M3/etc. https://kumomta.com/
Dunno if it'll do everything you need, but it immediately clicked for me as sounding the closest to what you might need. Amazon SES works pretty well, too, but there would be ongoing costs incurred, of course. Cheers, Al On Mon, Apr 7, 2025 at 12:25 PM John Levine via mailop <mailop@mailop.org> wrote: > > I'm consulting for a non-profit that needs to upgrade its mail system. They > send > about 100,000 messages a day, a combination of a nightly update message that > people can subscribe to, and transactional mail reporting when things happen. > There's no discussion lists, and the inbound mail is a relative trickle, > adequately hosted at Google. The mail stream is very clean and most of the > complaints we get are people asing where's my nightly update when the job that > creates them burps. > > It's currently running through an old sendmail server but surely we can do > better than that. What should I use? We particularly want good logging so when > someone asks why didn't I get my update we can tell them without grepping > through a whole day's logs. We also have problems of people signing up with > fake > addresses so I need to be able to collect signup confirmation failures fairly > quickly and turn off the corresponding accounts. (Yeah, I know about sending a > message with a link, but people use throwaway address places that work for a > day > and then stop.) > > I have a place to host a VPS and send mail which is not Google or AWS or Azure > so that's not a problem. > > TIA, > John > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop -- Al Iverson // 312-725-0130 // Chicago http://www.spamresource.com // Deliverability http://www.aliverson.com // All about me https://xnnd.com/calendar // Book my calendar _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
