Not sure if this is more of a courier-imap issue, or a vmailmgr issue, but... The new courier-imap 4.xx packages will not sure auth_vmailmgr provided by the vmailmgr package. (While vmailmgr is admittedly ancient and no longer maintained, I know of no security problems with it, nor have I found an adequate replacement, and it is _still_in_portage_, so should remain supported or be removed). Reproducible: Always Steps to Reproduce:
*** This bug has been marked as a duplicate of 82760 ***