I have problem with office365,
Mail delivery failed via SMTP server 'smtp.office365.com'.
SMTPDataError: 550
5.7.60 SMTP; Client does not have permissions to send as this sender
i have changed alias on General Settings into our own domain name
Outgoing set up all ready test connection successfully
imcoming set up confirmed
still not able to send email and received email
SMTPDataError: 550