Hello, I've a problem with the notification of the forum. It happens that the user email is no more valid, so when he receives a notification I receive this email:
Code:
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
ilgabbiano24.pt@gmail.it
SMTP error from remote mail server after RCPT TO:<ilgabbiano24.pt@gmail.it>:
host mx1.gmail.it [84.19.190.13]: 550 5.1.1 <ilgabbiano24.pt@gmail.it>:
Recipient address rejected: User unknown in virtual mailbox table
This is a big problem, and now it seems that my email address is blacklisted because of spam!

Can you help me please?