i got the Problem that some recipients get my messages in their SPAM Folder. So sending Problem.
I am using OTRS 6 and Sendmail so far.
Now i want to change the sendmail settings to use a shared mailbox on exchange online. (SMTPS / SMTLS)
What will i need to change and what are the credentials to use a shared mailbox? firstname.lastname@example.org\sharedmailbox is not working anyway.
Connection says green but Message appears red:
"Envelope to root@localhost" not accepted by the server
....Error sending message using backend Kernel...