Mac Mail - High Sierra 10.13 - Setup Guide

Important Points

  • First you need to make sure the email address(es) you will be sending from have been authorised in our Control Panel.
  • These instructions assume your email account has already been setup and is collecting email correctly.
  • Take a note of any settings you change.
  • Only change the items specified - you should not need to change POP3 / IMAP settings.

Step 1

  • Open Mac Mail on High Sierra by clicking the Icon
Mac Mail - Step 1 - Open Mail

Step 2

  • Go to the Mac 'Mail' menu and click 'Preferences'
High Sierra 10.13 - Mac Mail - Step 2 - Open Mail menu and click Preferences

Step 3

  • Click on the Mac Mail account you wish to edit
    • If you have multiple accounts, you will need to edit each one separately
    • We recommend that you restart Mac Mail between each config change
  • Go to the 'Server Settings' tab
High Sierra 10.13 - Mac Mail - Step 3 - Click edit SMTP Server List

Step 4

  • Click on the 'Outgoing Mail Server' drop down menu and select 'Edit SMTP Server List...'
High Sierra 10.13 - Mac Mail - Step 4 - Enter Outgoing Mailserver

Step 5

  • Click on the plus (+) button to add another SMTP server
High Sierra 10.13 - Mac Mail - Step 5 - Change the SMTP port, set Authentication to MD5 Challenge-Response and enter your username and password

Step 6

  • For the description enter 'AuthSMTP'
  • Enter your AuthSMTP username and password
    • Please ensure that you use the SMTP password and not the control panel password
    • You can test your SMTP username and password using our online password checker tool
  • For the 'Host Name' enter 'mail.authsmtp.com'
  • Untick 'Automatically manage connection settings' (IMPORTANT)
  • Tick the box for 'Use TLS/SSL'
  • Click on 'Authentication' and select 'MD5 Challenge-Response'
  • Click 'OK'
High Sierra 10.13 - Mac Mail - Step 6 - Set AuthSMTP as alternate SMTP server

Step 7

  • You have now setup the AuthSMTP outgoing mail server
  • Please ensure that 'AuthSMTP' is selected in the drop-down menu next to 'Outgoing Mail Server'
  • Click 'Save' to keep the changes
High Sierra 10.13 - Mac Mail - Step 7 - Set AuthSMTP as alternate SMTP server

Step 8

  • If you would like to use your AuthSMTP service with multiple accounts we would recommend that you configure each account in turn and restart Mac Mail between each account change, we have found issues with this version when editing multiple account configurations.
  • The setup is now completed and you should be able to send email via your AuthSMTP account.