Here's a wild guess. If you're using sendmail, see what the MeToo setting is set to. If it's false, it will stop messages sent by a user to themselves from being delivered if the delivery is part of an alias expansion.

Also, try looking in your mail server logs to see if it gives any hints.

In reply to Re: Mail::Audit Resend Never Arrives by sgifford
in thread Mail::Audit Resend Never Arrives by tertullian01

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