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Best email provider against spam?
(lemy.lol)
This is a most excellent place for technology news and articles.
There's a large org (@ hope.net) that has a non-profit convention every few years. It maintains a e-mail list to let its > 1000 previous attendees know about the upcoming convention and related info. In the past decades everything was fine.
This year (con in July) Gmail has been spam-binning ALL of those reminder e-mails aimed at attendees who use Gmail. Quite clearly it's not the users making that choice. The org is left with no other way to contact those attendees.
Then my guess is that someone got ahold of that email list and started using it to send spam and that caused Gmails algorithm to start flagging anything sent out to a bunch of members of that email group at the same time as such.
Maybe someone spoofed the From field on some spam, using their email address. Thereby marking that From address as a spammer. I've seen this happen both ways.