have tried fairemail, the two functions of forwarding email (with attachements) directily and email address auto-completing are very nice.
hope the same functions are developed for k9
Surely k-9 can already do both of these things?
try fairemail first, and then come back to see if they are the same things
If you are forwarding an email, how does a mail client know who you are forwarding it to?
Recently used addresses list would possibly be a go though.