Edit Exim Configuration (CLI Command Line Option)


The preferred way to apply the necessary config is to create /etc/exim.conf.local, and paste in the following:


%RETRYBLOCK%
+secondarymx                    *                               F,4h,5m; G,16h,1h,1.5; F,4d,8h
*                               *                               F,2h,15m; G,16h,1h,1.5; F,4d,8h
@AUTH@
outboundemailfilter_login:
 driver = plaintext
 public_name = LOGIN
 client_send = : YourUsername : YourPassword
@BEGINACL@

@CONFIG@


@DIRECTOREND@

@DIRECTORMIDDLE@

@DIRECTORSTART@

@ENDACL@

@POSTMAILCOUNT@

@PREDOTFORWARD@

@PREFILTER@

@PRELOCALUSER@

@PRENOALIASDISCARD@

@PREROUTERS@

@PREVALIASNOSTAR@

@PREVALIASSTAR@

@PREVIRTUALUSER@

@RETRYEND@

@RETRYSTART@

@REWRITE@

@ROUTEREND@

@ROUTERMIDDLE@

@ROUTERSTART@
send_to_outboundemailfilter:
driver = manualroute
domains = ! +local_domains
transport = outbound.ouemfi.com
hosts_randomize = true
route_list = * outbound.ouemfi.com::25 randomize byname
host_find_failed = defer
no_more
@TRANSPORTEND@

@TRANSPORTMIDDLE@

@TRANSPORTSTART@
outbound.ouemfi.com:
driver = smtp
hosts_require_auth = *
tls_tempfail_tryclear = true
headers_add = X-AuthUser: ${if match {$authenticated_id}{.*@.*}\
{$authenticated_id} {${if match {$authenticated_id}{.+}\
{$authenticated_id@$primary_hostname}{$authenticated_id}}}}

Save and exit /etc/exim.conf.local

There is an example configuration file attached to this KB article.


Edit Exim Configuration (GUI Option)

The configuration above can be replicated via the CPanel GUI. 

  • In CPanel, navigate to Service Configuration -> Exim Configuration Manager. 
  • Click on the Advanced tab, and scroll down about halfway, to "Section: AUTH" (You can search in the page to help find it)
  • Add the following to Section: AUTH, replacing YourUsername and YourPassword with those provided to you:


outboundemailfilter_login:
 driver = plaintext
 public_name = LOGIN
 client_send = : YourUsername : YourPassword




Scroll to Section: ROUTERSTART, and paste in the following:


send_to_outboundemailfilter:
driver = manualroute
domains = ! +local_domains
transport = outbound.ouemfi.com
hosts_randomize = true
route_list = * outbound.ouemfi.com::25 randomize byname
host_find_failed = defer
no_more




Scroll to Section: TRANSPORTSTART, and paste in the following:


outbound.ouemfi.com:
driver = smtp
hosts_require_auth = *
tls_tempfail_tryclear = true
headers_add = X-AuthUser: ${if match {$authenticated_id}{.*@.*}\
{$authenticated_id} {${if match {$authenticated_id}{.+}\
{$authenticated_id@$primary_hostname}{$authenticated_id}}}}

Scroll to the bottom, and click Save


Setup for mailman lists

If you use mailman lists in CPanel, you'll need to manually edit /etc/exim.conf. Find a section which looks something like this (may vary in different version of CPanel):


mailman_virtual_transport:
    driver = pipe
    command = /usr/local/cpanel/3rdparty/mailman/mail/mailman \
              '${if def:local_part_suffix \
                    {${sg{$local_part_suffix}{-(\\w+)(\\+.*)?}{\$1}}} \
                    {post}}' \
              ${lc:$local_part}_${lc:$domain}
    current_directory = /usr/local/cpanel/3rdparty/mailman
    home_directory = /usr/local/cpanel/3rdparty/mailman
    user = mailman
    group = mailman

And add the following directly after "group = mailman":


headers_add = "X-MC-MailingList:$original_local_part@$original_domain\n"

The resulting config will look like this:


mailman_virtual_transport:
    driver = pipe
    command = /usr/local/cpanel/3rdparty/mailman/mail/mailman \
              '${if def:local_part_suffix \
                    {${sg{$local_part_suffix}{-(\\w+)(\\+.*)?}{\$1}}} \
                    {post}}' \
              ${lc:$local_part}_${lc:$domain}
    current_directory = /usr/local/cpanel/3rdparty/mailman
    home_directory = /usr/local/cpanel/3rdparty/mailman
    user = mailman
    group = mailman
    headers_add = "X-MC-MailingList:$original_local_part@$original_domain\n"


Save and exit /etc/exim.conf.


Restart exim

Run systemctl restart exim to restart exim (assuming CentOS7 is the base OS for CPanel)


Send test email


From the command line, you can send a test email to yourself, by running the following (replacing <your-email-address> with a real one):


echo "Hello, I am your test" | mail -r <your-email-address> -s "Test email via outboundemailfilter.com" <your-email-address>

Check the contents of /var/log/exim_mainlog to confirm successful delivery

Here's an example of what a successful email delivery might look like:


2019-03-23 00:23:02 1h7URA-0001LA-Bg => test@example.com R=smarthost T=remote_smtp_smarthost H=outbound.ouemfi.com [54.69.62.154] X=TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 CV=no DN="CN=example.com,C=AU,ST=Some-State,O=Internet Widgits Pty Ltd" A=plain C="250 2.0.0 Ok: queued as d1b94395-4d01-11e9-9a10-d1cb19a74d67"
2019-03-23 00:23:02 1h7URA-0001LA-Bg Completed