FIX: "The message content has become corrupted" exception when email contains a UUE-encoded attachment in Exchange Server 2016

In a Microsoft Exchange Server 2016 environment, the Transport service may not send email messages that contain an attachment that was encoded with Unix-to-Unix Encoding (UUE) type. When this issue occurs, you experience the following exception:

This issue occurs because the UUE attachment size exceeds the defined MaximumBytes of the Transport's UUDecoder.

To resolve this issue, install Cumulative Update 5 for Exchange Server 2016 or a later cumulative update for Exchange Server 2016.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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