Thunderbird is an email client, not a web browser or a web server. It had to build in support for both of those things to support oauth2 login: https://bugzilla.mozilla.org/show_bug.cgi?id=849540

I assume Mail.app had to do the same.

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mixdup 2 hours ago | parent [-]

Okay? At some point mail applications didn't support IMAP, because it was new. Was IMAP bad because it forced POP3 clients to build new support that they didn't previously do in order to support the improved functionality?

OAuth wasn't about lock-in (since any client can support it), it was about getting off shitty legacy auth

	▲	ForHackernews 2 hours ago \| parent [-]
		OAuth2 solves a bunch of problems that are irrelevant for a desktop email client. https://news.ycombinator.com/item?id=50089261 You shouldn't need a web browser to read email.