I was incorporating some anti-spam measures and thought that this would be good too.
you know, in remote places third parties forge some email addresses hosted in your server, send those emails from remote servers, and when the recipient server rejects the email on any grounds, it comes to your own server as the return address.
I have researched some rules for this, but couldnt decide on how best to implement it safely.
Anyone have done this before or have any insight on the matter ?
Yes, would be very interested in this also. This has been happening more than normal lately.
In our situation, it seems to be just a few domains that this happens to. I suppose one way to (help) prevent it in the first place would be to deploy SPF records.
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