smtp send Office 365 failure

[rob_bac]

Hi im trying to send email through smtp Nettalk 9.31
We tried several settings but all without result.
As i understand these (see below) should work?

smtp.office365.com
port 587
login email and password

startTLS=ON
always SSL=OFF
TLS 1.2

I attached the lastemail.log (by the way had to rename that? for txt, log not supported??)

Any idea what is going wrong.

This is what the send screen displays for error:
Fout: Error in this Message. The remote Email (SMTP) server sent error = 554 5.2.0
STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied;
Failed to process message due to a permanent exception with message
Cannot submit message. 16.55847:C1100000, 17.43559:0000000094000000000000000000000000000000, 20

Thanks in advance!

Rob

[Bruce]

Your settings are all right, but your From address appears to be missing from Outlook's approved from address list for this account. See
https://social.technet.microsoft.com/Forums/lync/en-US/69426f64-717d-47e0-aa1b-700903ee83cc/520-storedrv-error?forum=exchangesvrsecuremessaginglegacy