DNS Caching is a method used to speed up the delivery of email messages. When enabled, all DNS query results are stored for a period of time determined in the configuration (time-to-live) of domain name records. This decreases the query load placed on the authoritative servers and ensures that answers to these queries are stored locally for rapid querying. NOTE: DNS caching is disabled by default for new installations.
Applies to SmarterMail 8.x - 15.x
Follow these steps to enable DNS caching:
- Log into SmarterMail as the system administrator.
- Click the Settings icon.
- Click Protocol Settings. The protocol settings will load in the content pane.
- Click the SMTP Out tab.
- Click the Enable DNS caching checkbox.
- Click Save.
For more information, please refer to the SmarterMail Online Help.
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