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What could cause email for which notice has been given via the small box on my screen when I'm using another program to not be in Thunderbird when I look for it

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  • 最后回复者为 Matt

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A small box with sender and subject info pops up in the lower right-hand corner of my screen while I'm working on something, then when I finish what I was doing and look for the email IT IS NOWHERE!, not in spam, trash or archive folders!

A small box with sender and subject info pops up in the lower right-hand corner of my screen while I'm working on something, then when I finish what I was doing and look for the email IT IS NOWHERE!, not in spam, trash or archive folders!

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lots of possibilities.

Moved to another folder like spam or somewhere else by a filter. Downloaded to another device with pop ad removed from the server is the other most common reason.