{{tag>mail}}

====== Install send only exim4 mail server ======
===== Install Exim and its dependencies =====
  apt-get -y install exim4
===== Configure Exim for your environment =====
  dpkg-reconfigure exim4-config

==== Mail Server Configuration Type ====
1. The first configuration window you encounter will ask you to
select the "mail server configuration type that best
meets your needs." If not already highlighted, use the
arrow keys on your keyboard to select:

    internet site;mail is sent and received directly using SMTP

2. The next configuration window will ask that you enter your
system's fully qualified domain name (FQDN) in the mail
name configuration screen. Type the command below,
substituting hostname, yourdomain & tld with your own
values:

    hostname.yourdomain.tld

3. The ensuing configuration window will ask you to decide on
which interfaces you would like Exim to "listen." Enter:

    127.0.0.1; ::1

for IVP4 and IPV6.

4. The configuration prompt that follows will ask that you enter
all of the destinations for which Exim should accept mail.
List your:

    FQDN;
    local hostname;
    localhost.localdomain;
    localhost

5. In the next screen, leave the "relay mail" field blank.

6. The subsequent screen is a follow-up to the relay-mail-server option. Leave this window blank.

7. Select No when asked whether to keep DNS queries to a minimum.

8. In the window that follows, choose whichever mail delivery
method you'd like for incoming mail; although the Maildir
format can make handling individual, locally-delivered mail
messages easier

9. In the ensuing prompt, choose the (default) unsplit configuration file by selecting "No"

10. In the last configuration window, you'll be asked to specify
postmaster mail recipients. Enter the command below,
substituting "you", "yourdomain" & "tld" with your own
values:

    root you@yourdomain.tld

Note: Make sure that, in addition to root, you enter at least
one external email address (choose one that you check frequently).

11. Check if the hostname is setup correctly. /etc/hosts should look like

    ...
    <public_ip>   hostname.yourdomain.tld hostname # add this line
    127.0.0.1	localhost
    ...

===== Test Your Mail Configuration =====
Send a test email to make sure everything is configured
correctly by issuing the following command (substituting
someone@somedomain.tld for a valid, external email
address):

    echo "This is a test." | mail -s Testing
    someone@somedomain.tld

Note: You may need check the recipient's SPAM folder, in
the event that the SPF record is not configured correctly.
====== Tested on ======
  * Debian 7 Wheezy

====== See also ======
  * [[wiki:add_dkim_dmarc_exim4_mta|Add DKIM and DMARC to exim4 MTA]]
  * [[wiki:configure_exim4_bypass_local_mail_delivery|Configure exim4 to bypass local mail delivery]]
  * [[wiki:mail_troubleshooting|Mail troubleshooting]]
  * [[wiki:send_mail_raspberrypi|Send mail from Raspberry pi]]

====== References ======
  * https://www.digitalocean.com/community/tutorials/how-to-install-the-send-only-mail-server-exim-on-ubuntu-12-04