Update the password authentication method for Mac Mail
To ensure that the settings for Mac Mail are correctly configured, perform the following steps:
In Mac Mail, go to Mail > Preferences.
- Click the Accounts tab.
Under Account Information, click the drop-down button next to Outgoing Mail Server and select Edit SMTP Server List.
Click the Advanced tab.
For Authentication, ensure Password is selected rather than MD5 Challenge-Response.
Click OK to close the SMTP window, and then click OK again to close Preferences.
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