From Prashant Dave by email on 12th April, 2016, and then adapted
by Madhu on 28th Dec, 2018.

Please find attached template of muttrc file "muttrc_template" and 
ssmpt file "ssmtp.conf_template".

For the template:
1. The muttrc_template should be in the home folder as $HOME/.mutt/muttrc-file and 
   user name and password needs to be mentioned. 
   The color files, etc (except the ssmtp one below) are to be in the
   $HOME/.mutt/ folder, with the same file-name (since the muttrc-template
   looks in this folder with that name.)
2. ssmtp.conf_template needs to be copied to /etc/ssmtp/ssmtp.conf
   gpo user name, password and local computer name to be specified. 
 
Install mutt and ssmtp on ubuntu using 
  sudo apt install mutt 
  sudo apt install ssmtp 

(For MS Windows: use through cygwin, and for Mac, 
use MacPorts (i.e. DarwinPorts) or Homebrew. Rest of this file is targetted
towards usage in GNU/Linux.)

For ease, alias mutt to 'mutt -F ~/.mutt/muttrc-template' by adding the
following line into all other aliases (like in .bashrc):

alias mutt='mutt -F ~/.mutt/muttrc-template'

Once these files are copied, mutt will run without any problem.    

Note: username (of gpo) has to be put in TWO files.
      password (of gpo) has to be put in TWO files.

Thanks and regards,
Prashant