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So I've been getting an increasing amount of email being "returned to sender" however I've never sent them. I also have confirmed the server never sent them either. This is clearly a spoofing issue. Thankfully a lot more email services use dmarc, dkim, and spf checking (as seen in the error below).
My question to y'all is: have you seen an increase in this behavior recently?
Email is usually similar to the below, but with data not redacted. Usually a one word subject line and one word in the email.
This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: SMTP error from remote mail server after end of data: 554 5.7.9 Message not accepted for policy reasons. Action: failed Final-Recipient: Status: 5.0.0 Remote-MTA: Diagnostic-Code: smtp; 554 5.7.9 Message not accepted for policy reasons. Subject: From: Date: To: -
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J james moved this topic from Support on
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