We are having issue with mainly
gmail.com, initially issue was with all domain on gsuite but somehow some of the gsuite's domain are working fine.
Getting error only when sending email to personal
gmail.com of any users:-
Remote
Server returned '550-5.7.26 This message does not pass authentication checks
(SPF and DKIM both 550-5.7.26 do not pass).
Checked the domain health everywhere, but seems to be healthy even at dns.google.