Hello,

I need some advice.

I'm using Exim (CPanel).
Every day, a spammer send hundreds of emails to one of my customer, trying different emails address.

For example :
alice@domain.com,
antoine@domaine.com,
alica@domaine.com,
etc...

So, since the email address does not exist, the mail server
send an email error to the sender... But the sender is not reachable. So all the emails stay in the mail queue.

Is there something I can do?
I already turn on the "Verify sender address" option in Exim.

Best regards.