OpenLDAP schema to dynamically generate a configuration file to poll mails via fetchmail .

• fetchmailEnabled >> TRUE or FALSE - used to deteced if the entry should be parsed or not
• fetchmailServer >> DNS-Name of the Mailserver (but also works with IP-Addresses)
• fetchmailProtocol >> e.g. pop3, imap or any other protocol supported by fetchmail
• fetchmailUsername >> Username of the mailbox you're connecting to
• fetchmailPassword >> same as above
• fetchmailCustom >> add any additionial commands like nokeep fetchall
• fetchmailSSL >> TRUE or FALSE - set this to enable SSL support

Basically you should have two Trees:

• one with the global settings used for each individual user, like fetchmailServer, fetchmailProtocol and fetchmailCustom
• another tree with the actual users (should be inetOrgPerson). These must have at least added fetchmail to ObjectClass and a valid mail attribute. Usually you also add the attributes fetchmailUsername and fetchmailPassword

So the tree looks like:

dc=foo,dc=bar
|_ ou=Templates 
|  |_ cn=fetchmailDefaults
|     |_ fetchmailEnabled = true
|     |_ fetchmailServer = pop.myserver.com
|     |_ fetchmailProtocol = pop3
|     |_ fetchmailCustom = nokeep fetchall
|     |_ fetchmailSSL = false
|     |_ sn = Fetchmail Default Values
|     |_ objectClass = top, inetOrgPerson, fetchmail
|_ ou=Users
   |_ uid=testuser
      |_ mail = [email protected]
      |_ fetchmailEnabled = true
      |_ fetchmailUsername = testuser
      |_ fetchmailPassword = topSecret
      |_ fetchmailSSL = true <-- This would overwrite the Default-Settings

This will generate the following line that will be passed to fetchmail:

poll pop.myserver.com proto pop3 user testuser pass toSecret is [email protected] here nokeep fetchall ssl

add this line to /etc/ldap/slapd.conf: include /etc/ldap/schema/fetchmail.schema

ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/fetchmail.ldif

Change

• BASE_DN
• BASE_DEFAULTS
• BASE_USERS

that it fits your LDAP configuration.

Run fetchmail.sh and take a look at the output - it should be similiar to the poll ... line.

If everything is fine setup a Cronjob to invoke the script:

*/5 * * * * /usr/local/bin/fetchmail.sh | fetchmail -f -

Vist: http://leckerbeef.de/fetchmail-ldap-integration/