Whenever I click on "Accept" onto an email I receive from my colleagues (who all use Windoze Outlook agains an Exchange Server), kmail2 creates TWO outgoing mails: one is the real "accepted" mail, and the problem is the second one: It is the same mail I received, with the same "From:" and "To:" Headers. So whenever I receive an invitation and accept it, it gets delivered to all recipients again - including myself ... The sent mail seems not to be excatly a 1:1 copy of the original mail however, as I find e.g. the header User-Agent: KOrganizer/4.11 (Linux/3.7.10-1.16-desktop; KDE/4.11.2; x86_64; ) and an attachment with: --nextPart1428619.I5Sl7TypH6 Content-Type: text/calendar; charset="utf-8"; method="request"; name="cal.ics" Content-Disposition: attachment Content-Transfer-Encoding: quoted-printable BEGIN:VCALENDAR PRODID:-//K Desktop Environment//NONSGML libkcal 4.3//EN VERSION:2.0 ... I can provide the mails in private but I don't want to attach them here. Reproducible: Always Expected Results: kmail2 must never send the original mail again.
Created attachment 83064 [details] test ics with which you can reproduce the problem