libc-client-dev 7:2002edebian1-13.2 (amd64 binary) in ubuntu gutsy

 C-client is a library of functions for accessing mail folders and messages.
 It was written as part of the University of Washington IMAP server, but has
 since found other use as well.
 .
 This package contains the static lib and headers for using the c-client mail
 handling library.