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Mailbox Alert

Mailbox Alert allows you to specify, for each seperate mail folder, a message, sound and/or a system command that will be executed when new mail is found there. ...

Rated 4 out of 5 stars (181)
1,038 users

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SoundPlus Requires Restart

SoundPlus customizes the sound that is played when a new message arrives for a particular contact in the address book, similar to mobile phones. There is also a variation that is played when a message arrives and it is a continuation of a thread.

Rated 3 out of 5 stars (15)
4 users

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Mailbox Full Alert (quota warning)

Get notified when your mailbox space is almost full.

Mailbox Full Alert (MFA) is a Thunderbird addon that monitors mailbox usage and warns you when the configured quota is exceeded.

Rated 5 out of 5 stars (1)
63 users

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