Contact form issues

Hello, I’m not sure if this is something you can help me with or not, but we’ve been testing the theme contact forms on our website (both the Quick Contact box and the contact page template) and messages from both go straight to our spam folder in the destination Gmail account. Gmail even labels them as phishing threats, which you have to click “ignore” before you can even read the thing.

There’s no way that I know of that we can label them all as safe and not spam, since you have to do that for specific email accounts and these messages will be coming from all different accounts (depending on who sends them). Is there anything you can suggest to help solve this problem? Thank you!