Hi list,

I use a unique email address (alias) for every web(service) registration. I would like to limit or even block spam sent to these unique addresses. I glanced through the Postfix book but couldn't find an answer.

Example of what should be blocked:

From: "Twitter System" <twit...@twitter.com>  <== faked
To: <webmas...@mydomain.org>

Example of what should be accepted:

From: "Twitter System" <twit...@twitter.com>  <== faked
To: <twe...@mydomain.org>

twitter.com and twe...@mydomain.org are the correct combination so accept the email.

So I'm trying to enforce that only a combination of a certain From: ... (the TLD) and a certain To: ... (the full email address) that was specifically used to register with the TLD in From: ... is accepted, otherwise REJECT.

Hope this makes sense. Anyone know if this is possible and how I can implement this? Pointers most welcome and appreciated.

Thanks and regards,
Patrick

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