How to block "on behalf of" addresses?

Author Message
  • Total Posts : 15
  • Reward points : 0
  • Joined: 1/5/2007
How to block "on behalf of" addresses? - Monday, April 30, 2018 3:18 PM
Hi All,
I have a repetitive spammer from China that sends the same email to me constantly (Multiple times per day). The subject and message body change frequently. I've been using keyword blocking but I still receive several (maybe 20%) because of variations in the wording. I'd like to block the email address but it's one of  "sent on behalf of" emails. Here is the specific:
From: Maggie <> on behalf of Maggie <>
The "" portion is always the same and the other address is different every email. How do I block this using the Email Blocklist Module? Do I select "Sender"? MIME Sender? or SMTP Sender? Will that even work?
Thank you,