Warning - errors were found in this domain's DNS records :

I have a little problem on a newly created domain in dns records I have an error message, “This domain has email enabled, but none of the MX records point to it” while the MX field has been created, if I delete the field the error disappears if I delete the mail server and I will reactivate the mail server field is created and the error message reaparait!
Bizare not?
Translated from French by Google