[horde] Lightning Caldav don't send mail invitation

[Álvaro Javier Gasco Fernández]

Hi all.

I have installed the new version of horde groupware. I have configurated my
calendar in lightning via Caldav URL, and if i want to send an invitation
to an attendee, it doesn't work, via ICS yes, not with Caldav.
Synchronization is good, create events, remove it...is good too.

is it configurated wrong? or probably is a horde's bug...

Thanks a lot.