![]() ![]() To view existing UserHeaders enter the following Terminal.app command: defaults read ~/Library/Containers//Data/Library/Preferences/ UserHeaders I'd display what you have then delete it. You can control how mail responds to "Disposition-Notification-To" via commands or an app Mail will always echo back your message to the sender. Īs far as I know, you cannot change how mail responds inbound "Return-Receipt-To". , see below, or install Mail Receipt which is a free macOS application that adds delivery notification and read receipt requests to your e-mails. To control, Disposition-Notification-To, you may use terminal comments document on this web page ![]() Could be used to tell if your work computer was powered on and mail app running.ĭisposition-Notification-To This asks for what you did with the email. macOS 10.10.5 I see this as a minor privacy issue in most circumstances. I was surprised that mail responded by sending the original message back to me. Return-Receipt-To This is asking for a verification that the mail got to your inbox. There are two header tags related to receipts: ![]()
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