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Postfix Documentation
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Preparing Postfix for LDAP or SQL lookups

LDAP and SQL are complex systems. Trying to set up both Postfix and LDAP or SQL at the same time is definitely not a good idea. You can save yourself a lot of time by implementing Postfix first with local files such as Berkeley DB. Local files have few surprises, and are easy to debug with the postmap(1) command:

% postmap -q [email protected] hash:/etc/postfix/virtual 

Once you have local files working properly you can follow the instructions in ldap_table(5), mysql_table(5) or pgsql_table(5) and replace local file lookups with LDAP or SQL lookups. When you do this, you should use the postmap(1) command again, to verify that database lookups still produce the exact same results as local file lookup:

% postmap -q [email protected] 

Be sure to exercise all the partial address or parent domain queries that are documented under "table search order" in the relevant manual page: access(5), canonical(5), virtual(5), transport(5), or under the relevant configuration parameter: mynetworks, relay_domains, parent_domain_matches_subdomains.

Postfix Documentation
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