My Outlook Meeting Requests are being sent as emails?! (gmail, Office, Microsoft)

[smithsl5]

All of a sudden, my outlook meeting requests are being sent as emails, meaning that the recipients are not seeing the time and date nor are they given any option to decline/accept the meeting. They just see the subject body.

It is technically a Gmail account that I'm using Outlook with, but it seems like I'm having the same issue no matter if I send the invite from Gmail or through Outlook.

If it helps, I am using Microsoft Office Professional Plus 2013.

Any advice?!?!

[Zymer]

In what format are you sending the message- HTML, RTF, plain text?