Fix email DNS settings Mx SOA etc increase success rate

I use gmail apps I have a domain on gmails servers. I am using a seperate DNS system to manage the DNS on enom. I will move to DNSmadeeasy and I want help with getting the SOA settings all correct. Currently getting the odd error from other email receivers. here is some errors from mxtoolbox.com. please reply with something that makes sense, that suggests that you know what you are doing. Canned responses are ignored. Errors: marc *removed my [login to view URL]* DNS Record not found More Info mx *removed my [login to view URL]* No DMARC Record found More Info blacklist [login to view URL] Blacklisted by SORBS DUHL More Info mx *removed my [login to view URL]* DMARC Quarantine/Reject policy not enabled More Info spf *removed my [login to view URL]* No SPF Record found More Info dns *removed my [login to view URL]* Local NS list does not match Parent NS list More Info dns *removed my [login to view URL]* Name Servers are on the Same Subnet More Info dns *removed my [login to view URL]* SOA Serial Number Format is Invalid More Info dns *removed my [login to view URL]* SOA Refresh Value is outside of the recommended range More Info smtp [login to view URL] Reverse DNS Resolution FAILED! This is a problem More Info