error sending email to gmail users

we have email domains from godaddy and when registering the DNS in cloudfare sending emails to gmail users does not work anymore the error displayed is

"sender and Gmail users, and has been blocked. The sender must
550-5.7.26 authenticate with at least one of SPF or DKIM. For this message,
550-5.7.26 DKIM checks did not pass and SPF check for [] did not
550-5.7.26 pass with ip "

Welcome to the Cloudflare Community. :logodrop:

The following Community #tutorial is a good place to start.