Sdbgrey

Sdbgrey is a powerful and efficient greylisting policy server designed for Postfix users. This advanced tool is based on the greylist.pl system from the postfix distribution, and works seamlessly with a variety of databases and supporting libraries.

In order to use Sdbgrey, users must have mysql and libsdb with mysql support. All database parameters can be easily configured at the top of the script in the variable database_url, making it simple to customize the tool to your specific needs. For those who prefer to use the default settings, simply type in mysql: create database greylist; grant all privileges on greylist.* to 'postfix'@'localhost' identified by 'postfix'; use greylist; create table greylist ( greykey varchar(255) unique not null, greyvalue integer not null default 0).

To start using Sdbgrey, users can simply run this script from /etc/postfix/master.cf: policy unix - n n - - spawn user=nobody argv=/usr/libexec/postfix/sdbgrey. For those who prefer to use Postfix SMTPD, the tool can be easily integrated with the following command in /etc/postfix/main.cf: smtpd_recipient_restrictions = ... reject_unauth_destination check_policy_service unix:private/policy ....

Overall, Sdbgrey is an efficient and reliable greylisting policy server that is ideal for Postfix users looking to enhance their email security and protection. With its intuitive interface and powerful features, this tool is a must-have for anyone seeking to optimize their email filtering system.