User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; it; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6 Build Identifier: thunderbird 2.0.0.6 I come endured to therefore of my demand, in the options/composition/addresses finds a function a lot interesting “you automatically add the address of the mail in escape to: …”, this makes that all the addresses written in the case to of the mail in escape come save in the specific rubrica (rubrica staff to you), but this makes that if the inidirizzo finds in an other rubrica (contacts) comes generated a duplicate of the contact, this point I ask if it exists eventually or if it is possible to preview an ulterior option in order not to save the contacts in present escape if in one whichever rubrica? Reproducible: Always Steps to Reproduce: 1. 2. 3. Excused my English I do not know, I hope is understood it the possible improvement to introduce. Thanks for the attention Good job

I think this is about the 'Automatically add outgoing e-mail addresses to me: ..." option in the Preferences. Is it a duplicate of bug 386076 ?

Looks like it. Bug 386076 got marked as a duplicate of bug 58769.