Avoid backscatter with aliases

Question

I have a pretty standard exim 4.90 setup of type "internet". Since a few days, this server has been added to the backscatterer blacklist.

After analysing the logs, I found the problem:

• I've received an email from [e-mail] rcpt to [e-mail]
• the spam ACLs give it a spamscore just bellow the drop limit
• [e-mail] is in /etc/aliases as [e-mail] => driver=redirect
• [e-mail] is external, therefore routed to the remote_smtp transport
• the remote_smtp transport tries to deliver the email to [e-mail] and the other server rejects the email with a SMTP error from remote mail server after end of data: 554 5.7.1 Command rejected
• Then my server tries to send a NDR to [e-mail]
• The fromdomain.com server rejects the email with a Recipient address rejected: Access denied

How can I avoid this kind of behavior? Would it be OK and possible to disable NDRs for aliases?