It was reported that when Geary, an email client, received a certificate error, it continued connecting without warning the user. This could lead to man-in-the-middle attacks. This has been fixed in upstream version 0.6.3 (this version is in Fedora 20 testing). References: https://bugzilla.gnome.org/show_bug.cgi?id=713247 https://git.gnome.org/browse/geary/commit/?h=geary-0.6&id=55f06a7bdcedb7efde6a516bde626ea28793ca7e
Created geary tracking bugs for this issue: Affects: fedora-19 [bug 1142006]