Automatically add to addressbook on send.

[Zelest]

It would be nice to have an option (could be turned off by default) which allow you to automatically add someone in your addressbook when you send a mail to them. I for one would love this as my antispam system could take advantage of it.

If you consider adding this feature, what about having 3 options? One that disables it (default?), a second one that automatically adds addresses to the addressbook and a third option which simply ask the user "do you want to add foo@… to your addressbook?".

[thomasb]

Marked #1324820 as duplicate of this.