moderated New message alerts in Thunderbird

Marty Hutchings

I am using Windows 10 with JAWS 21 and Thunderbird.  I am getting irritated with Thunderbird interupting JAWS when I am reading a message and a new message comes in, JAWS will interupt what I am reading to read the new message.  How can I stop this from happening.  I don't mind the message tone from Windows, but JAWS should continue reading without interuptions.

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