Update the Password Authentication Method for Mac Mail
To configure the settings for Mac Mail correctly, perform the following steps:
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In Mac Mail, go to Mail->Preferences.
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Click Accounts, then click the Server Settings tab.
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Click Outgoing Mail Server and select Edit SMTP Server List.
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Click the Server Settings tab.
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For Authentication, select Password rather than MD5 Challenge-Response.
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Click OK to close the SMTP window and click OK again to close Preferences.
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Updated 12 months ago