How do I fix an unauthenticated traffic limit error?

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    To help protect our customers from spam and scams, we need to ensure they're sending emails from an authenticated Telstra or BigPond email address.

    If you use email programs like Outlook or Apple Mail and they aren't set up correctly, you might see an error message with the reference "OB315." This means your email isn't being sent securely.

    To fix this issue, follow these steps to update your security settings in Outlook or Apple Mail for each device that you use to check and send emails:

    To ensure Apple Mail on Mac is sending correctly authenticated email:

    1. Open Apple Mail
    2. Select Mail, then Settings
    3. Select Accounts 
    4. Choose Server Settings
    5. Unselect Automatically manage connection settings in the 'Outgoing Mail Server (SMTP)' section
    6. Ensure Authentication is set to ‘Password’ and the checkbox for Use TLS/SSL is selected
    7. Select Save / OK to keep your changes.
    Diagram illustrating steps 3 to 5 listed above to update your Apple Mail security settings on Mac.
    Diagram illustrating steps 6 and 7 listed above to update your Apple Mail security settings on Mac.

    Important: If you’re still getting the error after you’ve followed these steps, make sure you’ve entered your most recent password in your Server settings in Outlook or Apple Mail.

    Hint: You can sign in to webmail to verify your password as it’s the same password.

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

    To ensure Apple Mail on iOS is sending correctly authenticated email:

    1. Go to the Settings menu and open Mail
    2. Select Accounts and choose your BigPond account
    3. Under the Outgoing Mail Server section, select SMTP to open a new window
    4. Select Primary server (mail.bigpond.com or smtp.telstra.com)
    5. Ensure Use SSL is switched on, showing green
    6. Set Authentication to 'Password' (ensure your email address and most recent password are entered and correct).
    Diagram illustrating step 3 listed above to update your Apple Mail security settings on iOS.
    Diagram illustrating step 4 listed above to update your Apple Mail security settings on iOS.
    Diagram illustrating step 5 and 6 listed above to update your Apple Mail security settings on iOS.

    Important: If you’re still getting the error after you’ve followed these steps, make sure you’ve entered your most recent password in your Server settings in Outlook or Apple Mail.

    Hint: You can sign in to webmail to verify your password as it’s the same password.

    To ensure Outlook 2016 is sending correctly authenticated email:

    1. Open Outlook 2016
    2. Select File
    3. Choose Info
    4. Select Server Settings
    5. Select the Outgoing Server tab
    6. Ensure My outgoing (SMTP) server requires authentication is ticked
    7. Make sure Use same settings as my incoming mail server is selected
    8. Select OK / Next to confirm the change.
    Diagram illustrating steps 6 and 7 listed above to update your Outlook 2016 security settings.

    Important: If you’re still getting the error after you’ve followed these steps, make sure you’ve entered your most recent password in your Server settings in Outlook or Apple Mail.

    Hint: You can sign in to webmail to verify your password as it’s the same password.

    For more information, visit Microsoft's guide to change or update email account settings in Outlook for Windows.

    To ensure Outlook 2013 is sending correctly authenticated email:

    1. Open Outlook 2013
    2. Select File
    3. Choose Info
    4. Select More Settings
    5. Select the Outgoing Server tab
    6. Ensure My outgoing server (SMTP) requires authentication is ticked
    7. Make sure Use same settings as my incoming mail server is selected
    8. Select OK to confirm the change.
    Diagram illustrating steps 5 to 7 listed above to update your Outlook 2013 security settings.

    Important: If you’re still getting the error after you’ve followed these steps, make sure you’ve entered your most recent password in your Server settings in Outlook or Apple Mail.

    Hint: You can sign in to webmail to verify your password as it’s the same password.

    For more information, visit Microsoft's guide to change or update email account settings in Outlook for Windows.

    To ensure Outlook 2010 is sending correctly authenticated email:

    1. Open Outlook 2010
    2. Select File
    3. Choose Info
    4. Select More Settings
    5. Select the Outgoing Server tab
    6. Ensure My outgoing server (SMTP) requires authentication is ticked
    7. Make sure Use same settings as my incoming mail server is selected
    8. Select OK to confirm the change.
    Diagram illustrating steps 5 to 7 listed above to update your Outlook 2010 security settings.

    Important: If you’re still getting the error after you’ve followed these steps, make sure you’ve entered your most recent password in your Server settings in Outlook or Apple Mail.

    Hint: You can sign in to webmail to verify your password as it’s the same password.

    For more information, visit Microsoft's guide to change or update email account settings in Outlook for Windows.

    To ensure Outlook 2007 is sending correctly authenticated email:

    1. Open Microsoft Outlook 2007
    2. Open the Tools menu, then select Account Settings
    3. Select More Settings
    4. Select the Outgoing Server tab
    5. Ensure My outgoing server (SMTP) requires authentication is ticked
    6. Make sure Use same settings as my incoming mail server is also selected
    7. Select OK to confirm the change.
    Diagram illustrating steps 5 to 7 listed above to update your Outlook 2007 security settings.

    Important: If you’re still getting the error after you’ve followed these steps, make sure you’ve entered your most recent password in your Server settings in Outlook or Apple Mail.

    Hint: You can sign in to webmail to verify your password as it’s the same password.

    For more information, visit Microsoft's guide to change or update email account settings in Outlook for Windows.

    If this happens when you're sending email from a phone or device, see our information on setting up email on a phone or tablet.

    Important: If you’re still getting the error after you’ve followed these steps, make sure you’ve entered your most recent password in your Server settings in Outlook or Apple Mail.

    Hint: You can sign in to webmail to verify your password as it’s the same password.

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