Mxtools warnings with Email Routing

Hello

When I check mxtools for my email routing domain i have this warning:

Status Warning dns mydomain SOA Serial Number Format is Invalid
Status Warning dns maydomain SOA Expire Value out of recommended range
Status Warning smtp / isaac mx Cloudflare net Reverse DNS Resolution - No PTR Record found
Status Warning smtp / isaac mx Cloudflare net May be an open relay.
Status Warning smtp / amir mx Cloudflare net Reverse DNS Resolution - No PTR Record found
Status Warning smtp / amir mx Cloudflare net May be an open relay.

Is it possible to correct all this warning ?

Thanks in advance

It is not possible. None of those warnings will cause you any issue.