Prolateral Consulting Ltd
Prolateral Consulting Ltd
Knowledgebase: outmail
How do I setup outmail (outbound SMTP) on Exim for WHM?


How to setup outmail (outbound SMTP) for the Exim mailserver in WHM or cPanel?


Follow the guide below to configure Exim to use Outmail as an outbound smarthost.

1. Login to your cPanel & WHM Admin Panel as an Administrator.  

2. Go to Home -> Service Configuration

3. Click on the 'Exim Configuration Manager' button

4. Click the 'Advanced Editor' tab

5. In the section marked 'Section: AUTH' add the following lines:-

driver = plaintext
public_name = LOGIN

Where OUTMAILUSERNAME and OUTMAILPASSWORD are your outmail credentials provided on sign-up.

6. In the section marked 'Section: ROUTERSTART' add the following lines:-

driver = manualroute
domains = ! +local_domains
transport = outmail_smtp

route_list = *

Where is the server provided on sign-up.

7. In the section marked 'Section: TRANSPORTSTART' add the following lines:-

driver = smtp
port = 2525
hosts =

hosts_require_auth =

Where is the server provided on sign-up. You can use either 2525, 25, 8025 or 587 as the port.

8. Click the SAVE button, and exim should restart.

Once it has restarted the outbound emails should all be sent through outmail.

Summary of details

Outgoing server

As provided to you on your signup email.

Outgoing server protocol


Outgoing server port

25, 587, 2525 or 8025


As provided


As provided

Uninstalling / Removing outMail

To change your outgoing SMTP server settings away from outMail simply follow the setup guide above and where asked to enter the outgoing SMTP mail server address and login credentials please use those provided to you for the service provider you are moving to.

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