Missing nameservers reported by parent FAIL: The following nameservers are listed at your nameservers as nameservers for your domain, but are not listed at the parent nameservers (see RFC2181 5.4.1). You need to make sure that these nameservers are working.If they are not working ok, you may have problems!
ns.ayvazhosting.com

Missing nameservers reported by your nameservers ERROR: One or more of the nameservers listed at the parent servers are not listed as NS records at your nameservers. The problem NS records are:
ns1.ayvazhosting.com
ns2.ayvazhosting.com
This is listed as an ERROR because there are some cases where nasty problems can occur (if the TTLs vary from the NS records at the root servers and the NS records point to your own domain, for example).

Stealth NS records sent Stealth NS records were sent:
ns.ayvazhosting.com

Reverse MX A records (PTR) ERROR: No reverse DNS (PTR) entries. The problem MX records are:
17.120.255.88.in-addr.arpa -> no reverse (PTR) detected
You should contact your ISP and ask him to add a PTR record for your ips