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Old 7 Sep 2020, 03:41 AM   #1
emoore
Essential Contributor
 
Join Date: Apr 2002
Posts: 228
Is the Fastmail app using OAuth2

https://www.fastmail.com/help/clients/apppassword.html says "Unlike a mail client, our mobile app does not need to save your password. After you successfully log in, the server sends our app a login token which it uses to authenticate you from then on. "

Is it using OAuth2?
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Old 8 Sep 2020, 09:56 AM   #2
n5bb
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Join Date: May 2004
Location: Irving, Texas
Posts: 8,610
The Fastmail mobile client uses JMAP. See:
RFC 8620 - The JSON Meta Application Protocol (JMAP)
http://www.faqs.org/rfcs/rfc8620.html

A search in that document finds:
Oauth 2.0 [RFC6749]

Fastmail uses TOTP (Time-based One-Time Password) techniques. See:
https://fastmail.blog/2016/07/22/how...tor-apps-work/

If you want to discover more you might find something on the Fastmail Github repository:
https://github.com/fastmail

Bill
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