2.2.29 [RFC3501] Section 6.3.10, STATUS Command

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V0044:

The specification states that clients SHOULD NOT expect to be able to issue many consecutive STATUS commands and obtain reasonable performance.

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

Outlook can be configured to send a large number of these commands consecutively, but does so on a background thread to avoid delaying user operations.

V0045:

The specification states that the following status data items can be requested: MESSAGES, RECENT, UIDNEXT, UIDVALIDITY, and UNSEEN.

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

Outlook requests only the UNSEEN status data item.