Reply emails ending up in spam

This is happening to me at my business too. Customers submit forms and I reply to them and never hear back unless they call to say "why didn't you respond to my email?" When I say that I did respond and ask them to search their spam folder they find it there. Any more information on this? It's a very expensive problem!

Do you reply from Submissions page at JotForm, or from your regular email client?

Is this happening with some specific form?

I still have the same problem and I reply from my email client.

@Pedro,

If you are replying to the forwarded emails, this might be an issue. Have you tried using direct email notifications to your gmail recipient address and replying to those emails?