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[GMail with Thunderbird] After authorization, Thunderbird is still unable to access account

See original GitHub issue

Thanks for creating this project. OAuth on Gmail will soon be mandatory, so this tool seems to be the only way now to use non-oauth clients.

Now I managed to get the OAuth part working (I think), but I am using Thunderbird and it still fails to log into the account even after I provided the token to the proxy.

This is the debug output I get:

2022-04-29 15:17:18: Accepting new connection to IMAP server at localhost:1993 (unsecured)
 proxying imap.gmail.com:993 (SSL/TLS) via ('127.0.0.1', 20836)
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836) --> [ Client connected ]
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836)     <-- b'* OK Gimap ready for requests from xx k5mb14775076ljm\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836) <-- b'* OK Gimap ready for requests from xx k5mb14775076ljm\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836) --> b'1 capability\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836)     --> b'1 capability\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836)     <-- b'* CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 XYZZY SASL-IR AUTH=XOAUTH2 AUTH=PLAIN AUTH=PLAIN-CLIENTTOKEN AUTH=OAUTHBEARER AUTH=XOAUTH\r\n1 OK Thats all she wrote! k5mb14775076ljm\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836) <-- b'* CAPABILITY IMAP4rev1 UNSELECT IDLE
NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 XYZZY SASL-IR AUTH=PLAIN AUTH=PLAIN-CLIENTTOK
EN AUTH=PLAIN AUTH=XOAUTH\r\n1 OK Thats all she wrote! k5mb14775076ljm\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836) --> b'2 authenticate plain\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836) <-- b'+ \r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836) --> b'[[ Credentials removed from proxy log ]]'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836)     --> b'2 AUTHENTICATE XOAUTH2 '
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836)     --> b'[[ Credentials removed from proxy log ]]'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836)     --> b'\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836)     <-- b'* CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH UTF8=ACCEPT LIST-EXTENDED LIST-STATUS LITERAL- SPECIAL-USE APPENDLIMIT=35651
584\r\n2 OK xxxx@gmail.com authenticated (Success)\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836) <-- b'* CAPABILITY IMAP4rev1 UNSELECT IDLENAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH UTF8=ACCEPT LIST-EXTENDED LIST-STATUS LITERAL- SPECIAL-USE APPENDLIMIT=35651584\r\n2 OK xxxx@gmail.com authenticated (Success)\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836) --> b'3 COMPRESS DEFLATE\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836)     --> b'3 COMPRESS DEFLATE\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836)     <-- b'3 OK Success\r\n'
2022-04-29 15:17:19: IMAP ('127.0.0.1', 20836) <-- b'3 OK Success\r\n'
2022-04-29 15:18:59: IMAP ('127.0.0.1', 20836) --> [ Client disconnected ]

Thunderbird is stuck at this point with status bar message:

Sending login information...

So for some reason the proxy is not authenticating Thunderbird as a client?

Issue Analytics

State:
Created a year ago
Comments:6 (3 by maintainers)

Top GitHub Comments

1reaction

simonrobcommented, Apr 30, 2022

Thanks for persevering with this!

The key reason for this issue is, as you’ve identified, that the proxy doesn’t always enter pass-through mode correctly, both when multi line messages are received; and, when the confirmation message is in the same line as a CAPABILITY update.

Even with Thunderbird this isn’t the whole story, however, as that client does recognise a successful login (see my earlier message). The additional issue is that Thunderbird subsequently requests COMPRESS DEFLATE, which means the proxy can no longer parse any messages at all, and in non-pass-through mode this means that its line ending check always fails, causing it to stop relaying messages.

I’ll look at a fix later that resolves these interconnected issues. Thanks again for the help with this.

0reactions

caspercommented, Apr 30, 2022

Ok. Great. Good stuff. Thanks for your work.

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