Form no longer sends, get red border error message mostly, sometimes orange

This form used to work fine, but lately (not sure how long ago) it quit sending. Usually, I get a red border error when testing it. I did check out your FAQ and everything is set up correctly. I did recently change the From email address on the form, but it’s an address with the same domain and even when I change and test it with other email addresses on the domain it does not work. Sometimes when I test the form I get an orange (spam) border, but when I change the contents that I entered, then I get a red border.

Every From address I’ve used in the form is a working email address, and I’ve tested them all again. However when I go to my domain’s C Panel, I track email delivery and it does not register any emails sent from the form. So it’s like it’s not connecting or something. Any advice?

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