I definitely sympathize but realistically there is little we can do to help. If emails are being treated as spam that is because of the spam filtering policies of the email services used to receive the ticket emails – and I’m afraid that is not something we can influence.
With that said, if you can identify facets of the ticket emails that somehow lend themselves to being identified as spam then we’re open to your feedback (which you could post here on the forums or over on UserVoice in the form of a feature request) – at this time, though, I don’t think there is any reason to think the problem lies with what our plugin is doing.
For that reason I’m going to close this thread, but I do hope you can figure out a solution by talking to your hosting or email provider and, once again, if anything suggesting there is an issue with our ticket emails comes to light we’ll happily take another look.
Thanks – and good luck.