mailutils-mh-dbgsym 1:2.99.99-1ubuntu2 (arm64 binary) in ubuntu xenial

 GNU Mailutils is a rich and powerful protocol-independent mail framework.
 It contains a series of useful mail libraries, clients, and servers.
 .
 These are the GNU mailutils MH utilities. It is an implementation of MH, a
 collection of small shell programs to read and handle mail in a very flexible
 way.