For about the past couple months all my Zencart messages via Contact Us, anything originating from the Zen website , is being rejected. Ive tried two different emails to test this. One Earthlink email rejects it as Non deliverable. Gmail puts it into the SPam folder. This is the email set in COnfig/email options

This only started about two months ago when I noticed I wasn't getting any website inquiries into the forwarded email box. It worked fine for the past 10 years.