Not receiving emails from Jotform.com

Hi,

We are using Google Workspace email accounts with our Homestead website. For the last week, emails sent from Jotform.com to our email addresses are bouncing. We had no problems for years until a week ago. When I check the email log in Workspace, I can see the bounced emails with this message:

"50-5.7.26 Unauthenticated email from jotform.com is not accepted due to domain's DMARC policy. Please contact the administrator of  jotform.com domain if this was a legitimate mail."

I whitelisted Jotform's email addresses and IP addresses with Workspace but that didn't help. Jotform suggested I set up SMTP with them, but that didn't help.

Next suggestion was the the Homestead MX records might be out of date. When I try to access Advanced DNS settings in Homestead, I get an error message:

"Sorry, you cannot edit your advanced DNS settings for this domain because you have altered your default nameservers. If you wish to edit your advanced DNS settings, please reset your nameservers to the default Homestead nameservers first."

I have never changed the nameservers, so that is puzzling. I tried to reset the nameservers to default, but each time I simply get this blank listing.

Basically, I need help preventing Jotform emails from bouncing. Thanks in advance!

Susan