For a client with  pxplus 12.5 I'm using *web/email for outgoing mail. They recently switched to Office 365  for their mail.
I changed the smtp variabele. Now it contains 'smtp.office365.com; 587; userid; password'.
The errormessage that is returned says 'Sending to SMTP Server Failed; (274): Unable to move mail to sent folder (274).
No e-mail is sent.
What am I doing wrong ?