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DSN and Return Receipt
Neither of these seem to be working.
I have an up-to-date version of Thunderbird installed (24.3.0). I compose an email, click on options, and check off both Return Receipt and Delivery Status Notification. I have tested this with various email addresses. The additional header never shows up anywhere--it appears that nothing is happening when I select these options (and nothing happens on the recipients' ends, and I never receive any notifications afterward). Please advise. Thank you!