----------------------
                         Gmail Debian Smarthost
                         ----------------------
Feb. 14, 2016

This should only be done for a single user system. All email will come
from the authenticated gmail account.

Configure sending mail:
 1) run: dpkg-reconfigure exim4-config
    following the configuration prompts
 2) General type of mail configuration:
    - mail sent by smarthost: received via sMTP or fetchmail
 3) System mail name:
    - Enter the system mail name
 4) IP-addresses to listen on for incoming SMTP connections:
    - Set to the local interface ipv4 and ipv6 if available
      127.0.0.1 ; ::1
 5) Other destination for which mail is accepted:
    - Blank
 6) Machines to relay mail for:
    - Blank
 7) IP address or host name of the outgoing smarthost:
    smtp.gmail.com::587
 8) Hide local mail name in outgoing mail?
    - No
 9) Keep number of DNS-queries minimal (Dial-on-Demand)?
    - No
10) Delivery method for local mail:
    - mbox format in /var/mail/
11) Split configuration into small files?
    - Yes
12) If you use two factor authentication, generate a Google application
    password
13) Edit /etc/exim4/passwd.client and add the line:
    *.google.com:your_username@gmail.com:password_here
14) Edit /etc/email-addresses and map all of your local names to the
    gmail address.
    local_name: your_username@gmail.com
    local_name@localhost: your_username@gmail.com
    local_name@hostname: your_username@gmail.com
    local_name@hostname.localdomain: your_username@gmail.com
15) service exim4 restart

Configure retrieving mail:
 1) Setup /var/lib/fetchmail/.fetchmailrc changing your_name,
    password_here, and local_name:
    poll pop.gmail.com with proto POP3
    user 'your_username@gmail.com' there with password 'password_here' is local_name here options ssl
 2) Set permissions 600 on /var/lib/fetchmail/.fetchmailrc
 3) Set the cron job to retrieve mail periodically 
    crontab -u fetchmail -e
    */13 * * * * /usr/bin/fetchmail

Notes:
  - Gmail must be configured to allow POP access.
  - Exim log file
    /var/log/exim4/mainlog
  - Modify configuration
    edit: /etc/exim4/update-exim4.conf.conf
    run:  update-exim4.conf
  - Force retry on the mail queue
    run: exim -qf