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ElrondCTFlag for United States of America

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Flag incoming mail marked with return receipt

Is there any way to get Thunderbird to alert me that an incoming message has a return receipt flag on it BEFORE I open the message and the receipt is triggered? I work from home, and sometimes I'll look through my work mail late at night. However, I don't want customers to know I'm looking at mail at that hour; if I knew a message had a return receipt, I'd leave it until the next day. (Just blocking the return message from being sent raises its own red flags; I know there's no way to change the time that it reports.) However, I can't find any way of displaying that information, either as a column of the Inbox list of messages or in the message filters where I could color-code such a message. Any ideas?
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sda100
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ElrondCT
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ASKER

Doing a filter and adding a star provides what I want. It wasn't immediately obvious how to create the filter, but I found that choosing "Customize" in the filter selection box allows me to enter "Disposition-Notification-To" as a new header item to work with. There doesn't seem to be an exists/doesn't exist option, but choosing "contains" as the match method and looking for an @ sign, which every email address will have, seems to do the trick.

I'm listing this information for anyone who might look at this thread in the future. Thanks for your help pointing me in the right direction.
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sda100
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Sorry it wasn't immediately obvous.  From your question, you seemed fairly clued-up on these things - it's difficult to judge correctly!

Anyway, what you did to create the filter is actually the perfect way of doing it.

Steve :)
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ElrondCT
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ASKER

I've done some stuff with Thunderbird (and a lot on PCs in general), but custom filters was a new one for me. I was starting to post a question to you about how to do it, but I decided to play around with it, and it worked pretty easily. Thanks for your help.