I keep getting this error message when I send email with Znuny.
I am using Znuny 6.4.4 and configured it with the OAUTH2 authentication. It works for the POP3S configuration, I am able to fetch and receive a new ticket, but I am unable to send any message.SMTP authentication failed (SMTP code: 535, ErrorMessage: 535, 5.7.139 Authentication unsuccessful, the user credentials were incorrect. [SI1PR02CA0010.apcprd02.prod.outlook.com] )
I am very sure that I have correctly configured my OAUTH and my SMTP/Sendmailmodule as I follow this documentation https://www.znuny.org/en/blog/modern-au ... -microsoft. I have set the same email address for my System Email Address, OAUTH2 token request, and all SendmailModule related configuration.
I have been googling around for 2 weeks, and I can't find any solution to this. I would really realy appreciate any help on this.
Thanks.
Best Regards