Limit sender address after first mail forwarded #614
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I would like to limit who can sent me a mail to an alias by sender address or domain. Sometime, my address needs to be public in some services (e.g. some forums) even for a brief period of time, which can expose it to crawlers and spam. I wish with this feature can limit the exposure that can possibly have. It is rare case and I don't get much spam yet, just a precaution to a risk.
It would capture the first mail address got from that alias, hash either in full or just the domain (user configurable), the log in a DB. When new mails comes in, check against the record and take actions base on it.
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