libc-client2007e 8:2007f~dfsg-5ubuntu0.18.04.2 (s390x binary) in ubuntu bionic

 IMAP (Internet Message Access Protocol) is a method of accessing
 electronic messages kept on a (possibly shared) mail server.
 .
 The UW (University of Washington) IMAP toolkit provides the c-client
 mail-handling library supporting various network transport methods,
 file system storage formats, and authentication and authorization
 methods.
 .
 This package contains the shared c-client library.