Mac Mail - Yosemite 10.10 - Alternate Port - Setup Guide

Are you using the latest version of Apple's Mac OSX?
Please see our Mojave 10.14 Mac Mail SMTP server setup guide here.

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.
  • We have instructions for both default SMTP port and alternate SMTP port configurations - alternate port is generally used if your ISP blocks the normal port 25 SMTP access (as many do these days!).

Step 1

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

Step 2

  • Go to the Mac 'Mail' menu and click 'Preferences'
Yosemite 10.10 - Mac Mail - Step 2 - Open Mail menu and click Preferences

Step 3

  • Click on the Mac Mail account you wish to edit, you may have multiple accounts so if you do you will need to edit each one separately
  • Click on the 'Outgoing Mail Server' drop down menu and select 'Edit SMTP Server List...'
Yosemite 10.10 - Mac Mail - Step 3 - Click edit SMTP Server List

Step 4

  • Click on the plus (+) button to add another SMTP server
  • For the description enter 'AuthSMTP'
  • For the Server Name enter ''
Yosemite 10.10 - Mac Mail - Step 4 - Enter Outgoing Mailserver

Step 5

  • Go to the 'Advanced' tab
  • Untick 'Automatically detect and maintain account settings'
  • Set the port to '2525'
  • Click on 'Authentication' and select 'MD5 Challenge-Response'
  • Enter the AuthSMTP Username and Password that has been emailed to you
  • Click 'OK'
Yosemite 10.10 - Mac Mail - Step 5 - Change the SMTP port, set Authentication to MD5 Challenge-Response and enter your username and password

Step 6

  • 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'
  • Close the window
  • Yosemite 10.10 - Mac Mail - Step 6 - Set AuthSMTP as alternate SMTP server

    Step 7

    • When prompted click 'Save' to keep the changes

    Step 8

    • When you first click 'Get Mail' or go to send an email you may need to re-enter your AuthSMTP password
    • We recommend that you save the password in your keychain

    Step 9

    • If you would like to use your AuthSMTP service with multiple accounts you just need to click on the account you wish to edit, click on the 'Outgoing Mail Server' drop down menu and then select 'AuthSMTP' from the list of servers.
    • All Done!