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Mozilla Thunderbird 156 Email Client Brings Custom OAuth Support for POP3
Highlights of Mozilla Thunderbird 156 include custom OAuth support for POP3, custom OAuth support for issuer ID and client secret fields for IMAP and POP3, support for OpenPGP key properties to print debug information to the Error Console, and external browser login flow support for Yandex.
Several new Enterprise policies are present as well, including DisableUpdateSettings to prevent users from changing update settings, DisableDataCollectionSettings to prevent users from changing data collection settings, and DisableMessageForwardingFilters to prevent message filters from automatically forwarding messages.