How do I stop mail from automatically trash meeting invitations? Every time I accept a meeting invitation from Mail or Calendar, the invitation email automatically went to Mail's Trash folder.  Is there a way to stop Mail from deleting accepted email invitations?  Most of the times the invitation email contains useful informations, and I really don't want to delete those.
You can set a mailbox rule, that when a message is both in trash, and is a Meeting request, move it to the inbox (or a folder/area of your choice).

Screenshot is OSX which I imply that you are using. This would be possible on Windows too with a similar approach.