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Mozilla Thunderbird 155 Adds Custom OAuth Support for IMAP and SMTP Servers
Highlights of Mozilla Thunderbird 155 include an updated S/MIME pop-up that now shows signature, digest, encryption algorithms, and key sizes, custom OAuth support for IMAP and SMTP servers, new PKCE and external browser fields for custom OAuth settings, and new Enterprise policies to disable QR export and experimental features.
Thunderbird 155 also introduces a new option to make the default address book configurable for manually added contacts, streamlines manual account configuration with Exchange, Graph, and custom OAuth support, and adds support for OAuth add-ons to override built-in settings for selected domains and hostnames.