Why my emails are not arriving?

Can you help me? My e-mails sent from forms are not arriving anymore, from all forms that I have...

This is one of them:

https://www.jotform.com/build/70505806606656

I've checked your email history and found some blocked/bounced emails to this address c******s@p********a.sp.gov.br. 

Upon checking the email address I found it in our bounce list, here's the reason:

Reason(s) : X-Postfix; unable to look up host mx4as.prodam.sp.gov.br: Name

I already removed the email address from our bounce list, what I would suggest you is to check your email account history, this guide will help you to check it: https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History 

I will also suggest you to follow this guide in order to prevent bouncing issues: https://www.jotform.com/help/208-How-to-Prevent-Email-Bouncing-Related-Issues 

And this guide will help you to remove an email address from our bounce list: https://www.jotform.com/help/208-How-to-Prevent-Email-Bouncing-Related-Issues 

If the issue persists, you could try whitelisting our IP addresses, you will find the needed info here: https://www.jotform.com/help/145-Whitelisting-JotMails-IP-Addresses 

Another way to avoid email problems will be to set  up a custom sender email address using the SMTP method, this guide will help with that: https://www.jotform.com/help/244-How-to-Setup-SMTP-for-a-Form 

Hope this helps.