Because OP talked about Google not allowing small players to send e-mail here's my server's deliverability results to Google: https://i.imgur.com/sceZogI.png ht

Because OP talked about Google not allowing small players to send e-mail here's my server's deliverability results to Google: https://i.imgur.com/sceZogI.png https://i.imgur.com/sceZogI.png If you're wondering about the blacklist number, that's an error - the source site claims it knows nothing.