Whst are the DNS servers listedcin SmarterMail, and are you caching DNS data
Try changing to GOOGLE DNS: 8.8 8.8 and 8.8.4.4.
YouYou can also use 208.67.222.222 and 208.67.220.220.
Additionally, make certain you2on the latest version of SmarterMail 14.X or 15.X.
Earlier versions were not properly checking the secondary DNS records when the primary failed.
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