Assegnate 3 su 5 stelle

I could be extremely satisfied by this add-on, but unfortunately it does not always works. Infact, sometimes (quite often, I can estimate on 40% of incoming emails), it does not group correctly the conversations, showing other conversations not related with the one I am showing. Is there any way to solve this issue? Has this error been reported by someone else?

Questa recensione riguarda una versione precedente (2.13.4) del componente aggiuntivo.