Reverse DNS not found?
Question asked by Joseph Boo - 11/17/2014 at 7:43 PM
Dear all, l new here, l not very know about Reverse DNS problem. my smartelmail version is 13, so far l using almost a year and not any problem at all. But recenty when l send out one mail to my customer it show that my mail server don't have Reverse DNS,so the mail cannot send out to that cusotmer, the others is working Find.
Anyone here can tell me how to setup Reversa DNS in step by step. so far my dns alreday got mx record.
thank you in advance.
best regards,
joseph boo

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Joe Wolf Replied
Unfortunately there is no step by step guide to do this because there are so many variables. Generally whoever owns the IP Address(es) you are using has to set up the reverse DNS. A good start would be to put your IP Address in the search bar at the top right of this page: https://www.arin.net/

Thanks, -Joe
Bruce Barnes Replied
The reverse DNS is generally setup by the ISP who provides your static block of IP addresses.  You should contact them and request the proper rDNS mapping of the FQDN of the host which handles the SmarterMail traffic to the IP address you want the rDNS for as they are, generally, the only ones with the access and capability to modify the IN-ARPA database for their address block allocation.
Bruce Barnes ChicagoNetTech Inc brucecnt@comcast.net Phonr: (773) 491-9019 Phone: (224) 444-0169 E-Mail and DNS Security Specialist Network Security Specialist Customer Service Portal: https://portal.chicagonettech.com Website: https://www.ChicagoNetTech.com Security Blog: http://networkbastion.blogspot.com/ Web and E-Mail Hosting, E-Mail Security and Consulting

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