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Thunderbird Shows 'Unrecognized Command' When Accessing Mailbox (Doc ID 1449727.1)

Last updated on NOVEMBER 15, 2022

Applies to:

Oracle Communications Messaging Server - Version 6.3 and later
Information in this document applies to any platform.


A Messaging Server 7 MMP is being used to connect to a Messaging Server 6.3 store.

However, Thunderbird shows "unrecognized command" and freezes.  The following pop-up error was seen:

"The current operation on Sent did not succeed. The mail server for account <> responded :"

Is there any configuration change to have compatibility between MS7 MMP and MS6.3 store?


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