+1
I would LOVE this feature.
Especially as an option to automatically add every sender email address of every received /and/or (as an option) answered email. I wouldn't use a third party contact management app. I would keep it plain and simple.
Just create a file in the root of the SD-Card (or any other location):
aqua-contacts.csv
The content would be simple:
madonna;madonna@hotmail.com
Georg Washington;georgybaby@whithouse.org
Kostya Vasilyev;kosta@nospam.net
That way one could easily import from any other program, one could easily delete unwanted entries and one could easily update any changes. From my php-Experiences, a csv will remain functional for thousands of entries. Most users will only use a couple of hundreds at most.
To program it, that shouldn't be so tough. Whenever one replies to an email (or long presses an emailadress in an email and chooses "add to internal Address-List"), Aquamail would open the csv, check if it is already there and if not would append it to the end.
Plain and simple, yet functional.
THAT would be a killer-feature, giving it an advantage over any other Android-Emailclient I know of.
Check this:
http://kaitenmail.uservoice.com/forums/187792-general/suggestions/3798618-collect-emailadresses-when-replyingThe users demanded it for ages and now even via uservoice, but this K-10 guy simply doesn't care...
Love,
Dirk.