DNS/NS verification with Plesk and Registrar

On a VPS with CentOS 5 and Plesk 9.5.4 are 10 domains hosted. These domains can be seperated in 2 groups. Group A uses Webhosting and Mail from VPS. Group B uses Webhosting and no Mail from VPS (Google Apps Pro MX's instead) The domains are registered at a registrar where I can set up all the dns settings. The vps/domains do use the ns provided from the registrar. I will provide you screenshots of the domain settings from within Plesk and from the registrar. As everything is working I still noticed some "glitches". E.g. - Using mxtoolbox to lookup smtp gives "Reverse DNS FAILED". - Within Plesk I simply added domains and see a PTR record in DNS settings. Do I have to add this PTR at the registrar, too? As well as there are ns. entries that I don't know if they're needed or modified. Your job will be to lookup the current settings and provide me the correct dns settings; that all entries are valid and set up according to the rules.