Hi All,
May I seek for your help if you also received this kind of error when the Roundcube is receiving an email with attachments from a 3rd party email domain.
The error shows a Negative SMTP Response to data-dot : 550 5.7.1 Command Rejected
BODY = 7bit 550 5.7.1 from MT (smtp:[127.0.0.1]:10025_ 550 5.7.1 Command Rejected
Can anyone help me please