On January 3, 2017 6:11:35 AM EST, Rob Gunther <red...@gmail.com> wrote: >The other day I was thinking it would be cool if you could detect >legitimate replies to mail I send. > >Everyone gets spam with subjects like this: > >Re: some type of trash subject > >Obviously those are not replies to a message you sent. > >That got me thinking of ways to authenticate a legitimate reply to a >message I sent. > >I came up with a concept called 'Authenticated Reply Detection'. > >It uses the Message-ID header to encode some information when a message >goes out - no database or saving of Message-ID is required. > >If/When a reply comes back the details from Message-ID come back in the >'In-Reply-To' header. If validated the message is guaranteed to be a >reply >to a message I sent, and spamassassin could adjust scoring accordingly. > >Has anyone ever seen anything like that before for SA? Does it exist >already or any type of plugin etc? > > >Regards, > >Rob
I have definitely seen solutions to do this. Unsure if they were in mimedefang or SpamAssassin. Your encoded header idea I don't remember. Good idea so you don't need a redid etc. I predict it would be a good indicator of hamminess. The lack of the header or a wrong header might not be spam though. And if someone's account is compromised and they reply to messages I wouldn't white list based on this but that is true of any white list feature. Regards, KAM
