Sadly no, the Check & Log Email plugin don’t give me any error messages, only this:
“The test email has been sent by WordPress. Please note this does NOT mean it has been delivered.”
But I know the emails are not reaching my mail because the process is instantaneous. I make a test with a gmail address and by the time I check my phone the email is already there.
I’m gonna check this situation with my hosting provider again expecting a different result this time.