2.2.7 [RFC3501] Section 2.3.4, [RFC2822] Size Message Attribute

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V0007:

The specification defines the [RFC2822] Size message attribute, which specifies the number of octets in the message.

Microsoft Office Outlook 2007, Microsoft Outlook 2010, Microsoft Outlook 2013, Microsoft Outlook 2016, Microsoft Outlook 2019

Outlook uses the [RFC2822] Size value only for message-size display purposes; Outlook does not use the [RFC2822] Size value for any logical processing.