Hello,
I have been trying for days to find the SMTP error. The emails are being received correctly via POP but are not being sent correctly.
The error is "tls://EXCHANGE_SERVER:587/SMTP) 5.7.60 SMTP; Client does not have permissions to send as this sender"
Exchange_server is a placeholder for the server address.
The login data, ports and address are correct and are also read and sent correctly by Outlook and Gmail.
It appears you are authenticating the system email using a different user than the email itself and the authenticated user is not allowed to send as the system email.
Here is the first result online when searching the error:
Cheers.
Thank you very much!
However, the rights are correct and the login is the same as the sender name anyway, this is also configured correctly.
In the post it also suggested to make the username in the with details the full email address to match the system email.
Cheers.
After asking the provider, he confirmed that everything was configured correctly. Unfortunately, it still doesn't work.
Then you will simply need to contact your email provider for further assistance as this error comes from the mail server directly. They should have logs, message traces, etc. that will help debug this.
Cheers.
