I am not receiving emails from Evite

Hello,

I was contacted by my hiking group leader that her Evite invitation to me bounced back to her.  I checked my spam folder and it was not there.  I also logged into Xfinity to check if the email was there and it was not.  I do not have any filters setup.  I used to receive these emails without any issues.  Apparently others in our group who have comcast.net email addresses have had this issue.  What do I need to do to fix this?

Thanks,

[Edited: personal information]