Is there a way to give an address that allows the initial sender to send an unlimited number of messages, but eats mail from anyone else (exclusive sender)?
A. Yes… but be careful, since the first sender may not be the one you had in mind. If you give an address like this: someword.+.spamcowboy@spamgourmet.com or someword.sender.spamcowboy@spamgourmet.com the system will record the first sender on the address, allow all mail to that address from that sender, and eat all mail to that address from all others, unless they’re on your main list of trusted senders. More broadly, if you give an address like this: someword.*.spamcowboy@spamgourmet.com or someword.domain.spamcowboy@spamgourmet.com the system will record the domain of the first sender and accept mail at that address from any sender in that domain, eating mail from all others, unless they’re on your main list of trusted senders. Really, be careful with this one. One of our crew used this method to sign up for some semi-critical service, and then, what do you know, the first message came from an ‘opt-in’ spammer and he missed the important messages that followed. After that, guess w
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