ArchangelSteel

Hi!
I just realized this is happening to our email replies to customers who've used the contact form on our Squarespace site. I figured it out because we lost an over $5,300 sale when a customer who placed the order and then reached out to ask a question, got suspicious when he wasn't hearing back from me. I use a Gmail email account and he does as well. I had replied to him a couple of times, but my answers had gone to his junk mail, so he thought I was non-responsive and possibly a fraudulent site. Likewise, I was beginning to get suspicious that the purchase was fraudulent, because the customer wasn't responding to my replies to him.
He ended up canceling the sale, so I'm pretty upset over the loss. Now I wonder how many of my replies to people over the past have gone into those customers' junk mail folders and how many sales losses have resulted from that perceived lack of response.
This doesn't happen all the time, obviously, because I do communicate back and forth with many customers who've initiated the conversation via our contact form. 
Can you please help? I want to do whatever I can to understand how to fix this issue, whether it be in my Squarespace site settings or in my gmail account. 
Thank you for any assistance you can provide. www.archangelsteel.com is my site.

The checkout page can not be altered with custom code it is a SS security feature. There are some settings for the checkout page.
Settings > Cart & Checkout > Checkout > Store policies > TERMS OF SERVICE is one. Other settings in that area may be of interest as well.
Let us know how it goes.

In the interest of other people being helped by our correspondence:
Thank you! 
Yes, I already did that, because when I realized we may have lost a lot of sales over this issue, I was pretty desperate to get a bandage on problem quickly, so I edited the "Contact" form to ask folks to check their spam/junk folders if they don't hear back from us. I really appreciate you taking the time to try to troubleshoot this with me. 🙂   I'm guessing that if instead of just hitting the "Reply" on a contact form generated email to my gmail, I copy their email address over to a new email I generate myself, it might also prevent my answer from getting hung up in their junk/spam folders. Crossed fingers! Losing an over $5,000 sale really stings.

Hi, Creedon! 
Thank you! I responded. 🙂

I have used your form.

Please post the URL for a page on your site where we can see your issue. I can't say for sure we can help but I'd like to see how my email responds to your reply to a test form submission I make on your site.
A link to the backend of the your site won’t work for us, i.e. a url that contains /config/.
Please set up a site-wide password, if your site is not public and you've not already done so.
Post the password here.
Adding a site-wide password does not allow anyone to alter your site. It only allows those with the password to see your site.
Please read the site-wide password and how to share a link documentation to understand how they work.
We can then take a look at your issue.
You may find How to post a forum question post useful.