Emergency LDAP Rescue Procedure

First, turn off mail, otherwise mail won't find the destination users and bounce!

service dovecot stop

Next, turn off LDAP:

service ldap stop

This dumps the LDAP database:

slapcat -l dump.ldif

Dumps database into dump.ldif
Clean the directory /var/lib/ldap (BACK IT UP)

slapadd -l dump.ldif

Next, set the permissions on /var/lib/ldap to ldap:ldap
Startup ldap:

 service ldap start

Pray.

If praying worked, start mail:

service dovecot start