How do I???

I am struggling with this new version of KMail. I have multiple POP3 email 
accounts, which all come back to one IMAP account. I typically "read" my mail 
on-line and reply from that message list. However, that email address is not 
subscribed to most of my mailing lists. 
In the "old" KMail (F15 and before) I could use a default email address, or at 
least select from a list of email addresses in a pull-down menu. Now, with 
KMail2, the ONLY email address that is an option without manually entering it, 
is the email address for the IMAP account.
Is there any way to get the "old" behavior in the editor? If not, what's the 
best way to fill out a request? Bugzilla.kde.org???
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