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Use of CASA RBL in Qmail configuration

Qmail does not support the anti-spam function. According to the practice of Qmail, some patches are usually needed to provide these capabilities. The following is how to configure the services:

Our blacklist uses the DNS real-time blacklist technology and uses rblsmtpd to configure Qmail.

In the old version of ucspi – TCP, you need to download a patch to increase this function.

Note: in the new version ucspi - TCP 0.88, it already contains RBLSMTPD, you just need to installed ucspi - TCP 0.88 only.

Use of CASA RBL in Postfix configuration

Our blacklist uses the DNS real-time blacklist technology and uses RBL to make configurations in the course of Postfix.

Under the filter conditions (such as smtpd_client_restrictions) by using reject_rbl_client to fefuse blacklist connection, you could use multiple reject_rbl_client to separate, using multiple RBL in turn: In order to directly use the reject_rbl_client to fefuse blacklist connections under the filter conditions (such as smtpd_client_restrictions), you may use multiple reject_rbl_client separators and multiple RBLs in succession.

smtpd_client_restrictions =...

reject_rbl_client cblless.anti-spam.org.cn,...

If you want to test whether the RBL service is working correctly, you may add the‘warning_if_reject’instruction before the‘reject_maps_rbl’instruction to change the default declined action as the warning (the warning message will be seen in the email logs). The warning instruction is removed after the confirmation comes back to normal.