This happens only with Microsoft domain emails like outlook or other domain that uses Microsoft services.
I really doubt that is an accurate statement. Whatever osTicket does--it does exactly the same thing for all domains. The issue probably more accurately described as follows: Outlook domains (or other domains that use Microsoft services) do not display the message body.You need to determine if the html message is malformed, so that Microsoft domains can't display it, or if the problem is on the receiving end.Some email clients have the option to send emails in both plain-text and html (for clients that may not be able to read html). I just looked at the source for an osTicket notification, and found that it does not include a plain-text version. Is that possibly the problem?Jack