550 5.7.1 Message rejected as spam by Content Filtering

Content Filtering has been enabled on the recipients’ mail server. This configuration is incompatible with GFI MailEssentials when installed as a relay server, all email filtering should happen on the relay server. For more information on Content Filtering and how to disable it, please see the following:

If the mail server is Microsoft Exchange 2013 and 2016 server:

If the mail server is Microsoft Exchange 2010 server:

If the mail server is Microsoft Exchange 2007 server:

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