Invitations for attendees of events are always sent from the default identity in KMail rather than the one selected as event organizer. In my case, this has lead to an attendee getting hold of a mail identity I did not really plan to make known to them, and private event details have been sent out hrough the identity of my emplyer and through Google infrastructure, which was certainly not my intention. Reproducible: Always
Tracked in Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=748504
Can you try 4.14 ? Lots of stuff regarding invitations was fixed since then
(In reply to comment #2) > Can you try 4.14 ? Lots of stuff regarding invitations was fixed since then I meant 4.13
This looks like a duplicate of bug 160815.
4.14.10 still sends from wrong identity. This is also true for declining iCal invitations.
I fixed it in 5.6.2