A DNS server is used to convert a text server name into its numeric IP address and to return other information required for mail handling. FTGate will use the DNS defines in the machines network settings for the following features:
- RBL lists ( SMTP and Filter policy)
- SMTP PTR record checks
- SMTP SPF checks
- MX delivery of outbound mail
Direct DNS Queries
When this option is selected FTGate will not attempt to contact domain name servers directly but will send all traffic to the DNS servers listed
The DNS Timout will determine how log FTGate will wait fro a reply before deciding that the DNS is not going to respond.