tom@tomsmyth.ca writes:
Are folks still using Google Workspace or Sendgrid for Mailman?
No, but I did until May. I stopped because I wasn't actually using that Mailman instance for anything. As far as I know nothing has changed.
For Sendgrid, don't all sending addresses have to be verified?
Yes.
How do you get around that?
Basic answer, you don't. I used the approach of setting DMARC mitigation to Munge From for all outgoing mail.
I'm not sure that's entirely necessary. I seem to recall that there are documented ways to use Sendgrid to pass through mail with a different From if you set Sender or maybe the envelope From_. But it seemed annoying. Almost all traffic was from me anyway, so it didn't really matter to me. Munge From was easy (by default it even sets Reply-To appropriately for my use case).
I'm currently using a Linode for my mail server. I looked at Google cloud but it didn't seem to have any advantages over Linode, and I was already familiar with Linode. The only problem was Spamhaus had my IPv6 listed, and if you don't pay for the address you effectively get a /128 network from Linode. Spamhaus flat refuses to help in that case. So I configured Postfix to use only IPv4 for outgoing mail and that's working fine for me so far (but small amount of traffic).
-- GNU Mailman consultant (installation, migration, customization) Sirius Open Source https://www.siriusopensource.com/ Software systems consulting in Europe, North America, and Japan