Im using a free Mailgun account for all my self hosted services. Happy with it so far.

Proton only has SMTP on it’s business accounts, and you have to apply for one with a good reason (ie not for spam)

Is that true though? I use always on VPN (one of the 3 mentioned) and never had issues. I have more problems with Firefox/Fennec and adblocking add ons. I am in Europe so is this more a US issue? I get blocked sometimes because of GDPR