Version: unspecified OS: Linux I tried to workaround bug #291861 by adding In-Reply-To and References headers to Settings/Composer/Headers (Einstellungen/E-Mail-Editor/Vorspann in German). However, after clicking Apply, OK and then reopening the dialogue, the header is gone from the list. It is also not added to any emails I send. Reproducible: Didn't try Expected Results: KMail should save the In-Reply-To header in the settings and then also add them to outgoing messages.
Version is 4.7.4 on Gentoo Linux.
Fixed in 4.7.x/4.8/master. It's necessary to update your package
How do you mean "update my package"? Version 4.7.4 which I have installed appears to be the latest release - according to http://kde.org/ In case you mean I should update the Gentoo ebuild using a patch from KMail Git, please provide me with the commit id. I will then forward that to my colleagues at Gentoo/KDE.
Git commit 515f27a306f59913e8af2eb886ba28c4b859600a by Montel Laurent. Committed on 12/01/2012 at 08:42. Pushed by mlaurent into branch 'KDE/4.8'. Fix Bug 290702 - Custom mime header fields are not stored FIXED-IN: 4.8.1 BUG: 290702 (cherry picked from commit 0cb01ec600fc2f96104318fdc25b2b80089c0183)
Thanks!