https://support.microsoft.com/en-us/kb/2984937

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Outlook, GMail

Enter the following MX records. You may not be able to enter the priority value exactly as it appears in the table below—if you can, make sure ...

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E-Mail

Configure Outlook to use port 587 for sending email In order to change your port 25 settings to port 587 in Outlook, you must do the following: ...

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