05-28-2020 06:38 AM
Hey guys, wanted to see if I can can get any input on this here - had to Geoblock one of the countries for inbound/outbound traffic completely. Everything was fine until I found out that one of the employees started having issues with email delivery to the certain customer - "domain of sender address xxxx@mydomain.com does not resolve customer.email@customerdomain.com". Turns out mail servers of this certain customer (as well as other server infrastructure) located in that Geoblocked zone. Tried to identify range of their public addresses and allow inbound/outbound dns and smtp applications from my mail server and on-prem dns servers (just in case).
Issue still exists. No problems/issues with incoming emails from customer.email@customerdomain.com.
Will appreciate any help/suggestions.
Thanks.
06-02-2020 07:47 AM
Issue resolved, problem resided in the policy with the wrong DMZ zone assigned.
05-28-2020 09:18 AM
Query your traffic logs for denied traffic where your SMTP server is the source address.
06-02-2020 07:47 AM
Issue resolved, problem resided in the policy with the wrong DMZ zone assigned.
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