This article discusses backscatter, some possible ways to help reduce it, and why there is no easy way to resolve the problem.
Backscatter is a side effect of spammers sending forged bulk messages (spam) that appear to originate from valid e-mail addresses. Spammers do this to increase the likelihood of their messages getting through filters and reaching recipients. If spammers use e-mail addresses from your domain in their forged messages, you may receive backscatter.
The following steps outline how backscatter is generated:
This example scenario describes the process for one message, but spammers will usually send many, many messages. This generates a large number of bounce notification messages, all of which in this case go to [email protected].
Because of how the SMTP protocol works, there is unfortunately no one single “fix” that can be done to eliminate all backscatter all of the time.
However, there are a few things you can do to help reduce the likelihood of receiving backscatter:
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