Savaran

Company blatantly violates terms of service, surprised that access is shut off.

I’m in a similar boat. The only major issue I’ve found people are likely to run into is mass IP blocks from MS/Google. Where do you host it? Cloud provider these days or colo type place?

I finally ended up going to a larger mail service (paid, but free) that just provides an outgoing smtp relay for me. Even on a busy month I send far below the 1k emails they require before they start charging, and their servers IP ranges aren’t blanket blocked by the Google’s of the world.