All mail goes to spam

[TGates]

Good read about PTR and rDNS: http://www.itworld.com/article/2833006/n...cords.html
This site shows your reverse DNS: http://www.dnsqueries.com/en/reverse_lookup.php
and this one also shows the .in-addr.arpa.: http://www.dnswatch.info/ (just enter IP)
SPF/PTR creator: http://www.spfwizard.net/
Log into panel as zadmin, go to DNS Manager > Select domain you use for your mail server and add the PTR record created from above as an SPF record: (example)

Code:

TTL = 3600
Target = v=spf1 a mx ptr ip4:[xxx.xxx.xxx.xxx] mx:mail.[domain].com include:smtp.[relayer].net -all

Of course replace everything inside the [] brackets (also remove the brackets!) with your information.