Kmail won't save passwords

[Andreas Ruppen]

I have first a question. When you open kwalletmanager and then the default
wallet there should be an item kmail. This item contains different entrys.
One of them is password. Under this last line there is an entry for each
account you created. Are there entry for each of your account?

If not all of your accounts are present you can add an account by
left-clicking on "Password" and select "Add new entry"

Then you do a 
rua at matrix:~$ less .kde/share/config/kmailrc
and search for the account that does not save its password. Each account has
a field named Id. The value of this fiel will be the name for the new
kwallet-entry. Once the entry created you can click on the entry and then
add a value (the password). Save all, restart kmail and it should working.

Greets
Andy