mailutils should not depend on libmysqlclient* (currently:
libmysqlclient12).  I just wanted to install the `sieve` tool, but as long
as I don't want to install the MySQL stuff (and I don't want to!), I
can't.

Perhaps you should split the package if it has so many unrelated
dependencies (guile, libgcrypt, libgnutls, libgsasl, libmysqlclient)?

Or turn some of these dependencies into Recommends: or Suggests:?