We have some problems (especially with email sending) because there seems to be no automatic sync of all users on e.g. a daily basis.

Jenkins sends out mails to users that no longer exist in LDAP. They should be removed.
Please note, these mails are based on the user name (Subversion commit) and not generated by the mail notification post build action.

Email addresses that are changed in LDAP are also not changed in Jenkins. It still uses the old value.

Please provide a daily sync that updates the whole user list with the current LDAP data.