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Hi ,This is a great plugin which should be default feature in Thunderbird. I have been using this plugin for more than three months but suddenly from september 15 autocomplete of mail id feature is not working. I am using the Ubuntu Thunderbird 13.0.1 is it possible to fix this issue.

Questa recensione riguarda una versione precedente (1.5) del componente aggiuntivo. 

Thanks for your feedback.
Can you perform some checks ?
- what is your OS ?
- what is the version of mrc compose ?
- open the "Error console" from the "Tools" menu, then create a new message and try to enter a recipient. Then if there is new lines in the error console, just send them.