The fact that none of them are working tell me that you haven’t set them up properly.
Also, Brevo is not an SMTP plugin, it’s an SMTP service that you can use with an SMTP plugin.
This is not something we can fix for you. All WordPress sites are entirely self-contained, we have no more access than any normal visitor, nor do we want more than that.
Worse yet, this is a server problem, not a WordPress problem, and an unfortunately common one. You have two options:
- Properly setup an SMTP plugin to work-around the problem.
- Find a new hosting provider that doesn’t block PHP’s mail function.
I recommend first taking a deep breath, then select one SMTP plugin and follow its instructions to properly configure it. Once done, you’ll start receiving all emails from your WordPress site, including that elusive confirmation email.
If you run into trouble with that, don’t change plugins, just contact support for the SMTP plugin you chose.
