Does IEM's pixel tracking harm Gmail/Hotmail/etc. inbox rates? Because Gmail keeps sending my emails to the spam folder. I'm wondering if the embedded images (pixel tracking) have anything to do with it. Also: 1. Should I send plain-text emails only or both HTML and plain-text emails? 2. And if I choose the latter, do the HTML and text versions HAVE to match? Is my inbox rate harmed if they don't match? Thanks in advance. I really appreciate the help. I'll pay it forward.