Re: [mail-dev] Javamail with Oauth2 to connect to an IMAP Office 365 ser

[Andy Brunner <andy.brunner@xxxxxx>]

Hello Quentin,

After spending a huge amount of time, I was able to implement OAuth 2.0 for Microsoft 365 using JavaMail 1.6.7.

Generally, the procedure is as follows if you want to use OAuth 2.0 without user intervention:

• On portal.azure.com, define an application and the necessary client credentials (see example at https://squirrel.abdata.ch/oauth-2.0-support) 
• Obtain an OAuth 2.0 Access Token. JavaMail does not provide any help for this. I my case, I created a freeware Java class for this (sofa.k43.ch).
• Use this token in the connect() instead of a normal password

In my application, I used the properties:

Mail property mail.imaps.auth.login.disabe: true

Mail property mail.imaps.auth.plain.disable: true

Mail property mail.debug.auth.password: false

Mail property mail.mime.ignoreunknownencoding: true

Mail property mail.imaps.port: 993

Mail property mail.imaps.sasl.mechanisms: XOAUTH2

Mail property mail.store.protocol: imaps

Mail property mail.imaps.ssl.enable: true

Mail property mail.imaps.partialfetch: false

Mail property mail.mime.decodetext.strict: false

Mail property mail.debug.auth: true

Mail property mail.imaps.peek: true

Mail property mail.imaps.sasl.enable: true

Hope this helps. Good luck!

Regards

Andy Brunner

Kappelistrasse 43, CH-8002 Zürich, Tel +41 44 482 82 29

Am 12.12.2022 um 11:52 schrieb Quentin MAISONNEUVE <quentin.maisonneuve@xxxxxxxxxxxxxxx>:

Hello,

We are reaching out to you because we need your help to use the javamail library.

Microsoft is dropping the support of basic plain text auth for IMAP servers the 31 of December this year.

So we are trying to use it with the protocol Oauth 2 to connect to an IMAP Office 365 server but it dosen't seems to work despite configuring it as the documentation says.

We've tried some configuration from stackOverFlow too without success.

We've tried with the 1.6.7 and 2.0.1 versions of the library.

Do you have an example of configuration we can use / start with ?

PS : I've attached a the test file we are currently using, maybe you can point us out what is wrong.

Thank you by advance for your time.

Regards,

Quentin Maisonneuve

Developer at

XLOAN - Groupe Open

10, rue du Président Edouard Herriot, 44000 NANTES

Tel. +33 02 49 09 19 08

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