Bug#796467: general: if user has mail then how do we tell them if in GUI mode?

[Richard Jasmin <frazzledjazz@gmail.com>]

Package: general
Severity: important

telling user has mail is easy as pi in console mode and when using a server.
But how do we tell the user they have mail without a configured mail client
when under runlevel 5? The activation of X11 practically hides all console
activity.

We would need a UI tool to do this. We cannot assume use of neither gnome nor
KDE. User may have MATE or other UI installed.We should make an app
indicator(and mail viewer) as lite as possible.

Also, when launching xterm or similar, user is never told if they have mail or
not.This should be a more eay fix.Since xterm emulates a vterm/getty checking
mail this way should never fail.



-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.0.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)