I run a number of web sites where users wish to have their e-mail address with their own domain name. Some of these users (quite a few) do not read or send mail through their web site or via their own domain server; rather they wish their mail to be forwarded to a free mail account such as Yahoo! or Gmail.
Of course, the problems encountered with such a configuration have been discussed on this list. And, I have independently arrived at a solution I now see has been discussed: before forwarding incoming mail, munge the From: header to match the forwarding server, and copy the sender’s e-mail address to a Reply-To: header. Aside from being extremely ugly -- and problematic on a perception level — it is also unworkable when the original sender’s e-mail has been signed or encrypted. With signed or encrypted mail, the sender’s e-mail address no longer matches their certificate so the validation fails. I don’t see any solution to this problem other than abandoning DMARC. Unfortunately, a lot of organizations have adopted it, and the community suffers as a result. Honestly, I don’t think DMARC was thought-out before it was implemented. If I’m wrong, please set me straight and show me a solution. Thanks, Paul
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