Version: 1.9.9 (using 3.5.9, Debian Package 4:3.5.9.dfsg.1-2+b1 (lenny/sid))
Compiler: Target: i486-linux-gnu
OS: Linux (i686) release 2.6.22-3-k7
Problem: You are sending a mail to a colleague "Peter Meyer" and while entering "Peter M" auto completion suggests 2 or 3 addresses from history. Unfortunately, you happen to choose the one and only address that had beend canceled meanwhile and your recipient will never get your mail.
Solution: Activley decline the old address as soon as you are told it has been abandoned: Context menu: mark as invalid. The email address gets to the blacklisted recipients' list. Now you will be warned when you try to send a mail to the old address. It will occur red (or not at all) when you use auto completion from history.
Corrolar: This way you could also avoid responding to spam senders or phishers that ask you to send them a new password...
Thank you for your feature request. Kmail1 is currently unmaintained so we are closing all wishes. Please feel free to reopen a feature request for Kmail2 if it has not already been implemented.
Thank you for your understanding.
Instead of creating a new feature request, please confirm here if the wishlist is still valid for kmail2.