Clientlookup Option

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Performs a DNS reverse lookup on the client IP address when set to 1. The reverse lookup is performed unconditionally, so the SMTP relay server does not need to perform it. This option may be set on a per hosted domain basis.

Note that a DNS lookup is performed regardless of this setting if hostnames are used in a global tcpaccess filter or a per-domain or per-user access filter.


The default value is: 0

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