Troubleshoot Errors in macOS Sierra Mail Setup

User Name : name@example.com
Your user name is your full email address
Incoming Server : mail.example.com
Ports : IMAP 143 / POP 110
Outgoing Server : smtp.example.com
Port : SMTP 587

Yosemite-Mail-logo

This guide will help you fix errors in the setup of macOS Sierra Mail.

Note:

  • Is this the first time you’re setting up this email account? Then use our macOS Sierra setup guide, rather than this troubleshooting guide.
  • Change example.com to your domain name

Check account settings

  1. From the top menu choose Mail > Preferences…

    preferences

    Account Information

  2. On the Accounts tab, choose the relevant account from the list on the left, and check:
    • Enable this account is checked
    • Download attachments is set according to your preference
  3. Click Server Settings

    kh-sierra-accounts

    Server Settings

  4. Check:

    Important

  5. Deselect (uncheck) the boxes for Automatically manage connection settings for both Incoming and Outgoing Mail Servers – additional fields will now be displayed.
  6. Select Advanced IMAP Settingssierra-advanced-imap
  7. Select Allow insecure authentication > OK

     kh-sierra-advanced-imap

  8. Deselect (uncheck) the boxes for Use TSL/SSL for both Incoming and Outgoing Mail Servers.kh-sierra-settings-ssl-save
  9. Click Save. (Note: this button only becomes visible when settings have changed)

    Your macOS Sierra mail is now setup correctly.

Still struggling? Refer to our guide of common email problems or contact support@hetzner.co.za.