Repeatedly getting emails bounced back from IO Leads

Hi, we're sending out quite a few quote emails to customers that keep getting kicked back, especially by gmail. Is there a way to prevent this from happening so often. The message we get back is pasted below:From: Mail Delivery System <Mailer-Daemon@se25.mailspamprotection.com>

Sent: Tuesday, March 14, 2023 5:39 PM

To: sales@jasonsjumpcastles.com

Subject: Mail delivery failed: returning message to sender

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

[customeremail]@gmail.com

host gmail-smtp-in.l.google.com [64.233.182.27]

SMTP error from remote mail server after pipelined end of data:

550-5.7.26 This message does not pass authentication checks (SPF and DKIM both

550-5.7.26 do not pass). SPF check for [jasonsjumpcastles.com] does not pass

550-5.7.26 with ip: [185.56.85.150].To best protect our users from spam, the

550-5.7.26 message has been blocked. Please visit

550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more

550 5.7.26 information. j13-20020a02a68d000000b003c4f987683esi3155241jam.101 - gsmtp