Thread:Project:Support desk/User-to-user e-mail return addresses/reply

You need to set $wgUserEmailUseReplyTo in order for from address to be another user. Note there may be some problems with doing this and spam detection, (from code comments): // Put the sending user's e-mail address in the From: header. //                       // This is clean-looking and convenient, but has issues. // One is that it doesn't as clearly differentiate the wiki mail // from "directly" sent mails. //                       // Another is that some mailers (like sSMTP) will use the From // address as the envelope sender as well. For open sites this // can cause mails to be flunked for SPF violations (since the                       // wiki server isn't an authorized sender for various users'                        // domains) as well as creating a privacy issue as bounces // containing the recipient's e-mail address may get sent to                       // the sending user.