Hi all I'm cross-posting d-legal & mod_ldap author John Morrissey. If someone would add something about this issue, please add John in Cc.
John: We in Debian need some clarifications about your current license for mod_ldap. We need minimally to move proftpd-ldap in non-free section when 1.2.7 will be uploaded. But this is not a problem of yours surely :). Your problem is another one: you released under GPL and added a send-me-a-postcard condition as an additional constraint. Unfortunately, this (could) appear a violation of GPL licensing. My own suggestion is adopting an ad-hoc GPL-like modified license which contains also the postcard req. Or eventually drop that requirement. You could follow and contribute to the current discussion about this issue on debian-legal: http://lists.debian.org/debian-legal/2003/debian-legal-200301/msg00241.html -- Francesco P. Lovergine