Dnsrbl Option

Introduced in release: 8.0.2.1

The  MMP option provides a list of domain names used to perform a DNS Realtime Blackhole List check for incoming POP and IMAP connections. The checks are performed in serial and may significantly impact the time it takes for clients to connect to the proxy. When a connection is rejected, a protocol-appropriate access denied error will be provided unless the connection is over SSL and the  option is also set, in which case an SSL   alert will be sent. If the   option is set to , then the rejection will be noted in a   log entry in the store transaction log.

See also:
 * sslconnlimit Option
 * connlimits Option
 * Store Transaction Log Format
 * MMP and IMAP Proxy and POP Proxy and vdomain options