Set up Telstra Mail on Apple Mail

1. Go to the Apple menu and select Mail, then select Preferences 
2. On the ‘Accounts’ tab, select the + symbol
3. Enter your name, your Telstra email address and password, and select Sign in 
4. Select Done Your new email account should be successfully added.  BUT if automatic set-up doesn’t work:
5. Select Next to set up your Telstra email address manually. 
6. Manually enter the configuration settings below:
   • Account type: IMAP 
   • Incoming email server: imap.telstra.com
   • Outgoing (SMTP) email server: smtp.telstra.com. Select Continue, Incoming Mail Security 
   • Use Secure Sockets Layer (SSL): Ticked
   • Authentication: Password Outgoing Mail Server 
   • Outgoing mail server: smtp.telstra.com
   • Use Authentication: Ticked Outgoing Mail Security 
   • Use Secure Sockets Layer (SSL): Ticked
   • Authentication: Password Account Summary 
   • Take account online: Ticked 
7. Select Create. Your new email account should now be added.
    

For more information, visit Apple's guide to changing server settings in Mail on Mac.