blank header emails

Since Mailer-Daemon sends emails with blank senders you're actually required by RFCs to accept them.

That said, the latest version of my SpamBlocker-powered exim.conf file doesn't accept messages from blank senders unless the recipient address is located on your server.

Which will eliminate the problem you're experiencing.

It's just passed final testing, and will be announced as available some time today. At that time you can either install it yourself, hire us (or someone else) to install it, or or wait to see if DirectAdmin makes it a standard, as they did for my earlier version, issued many years ago, and now well out of date.

Jeff
 
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