SUMMARY I was asked on KDE's sub-reddit to open a ticket, after the contributor there tested my claim that Kontact/Kmail's caldav/cardav support did not work with Mailfence.com's Cardav/Caldav. He came to the same conclusion, it does not work. I think I also ran into this problem when I used Fastmail servers/service as well a few years back. There is a separate bug report opened in 2018 that looks to be ignored, asking for TLS certificate support for Caldav/Cardav. I note that here because Mailfence uses TLS certificates in their IMAP settings. Not sure if the issues are related, but worth noting. That bug report is here; https://bugs.kde.org/show_bug.cgi?id=393951 STEPS TO REPRODUCE 1. Used the DAv groupware resource 2. Entered user name and password 3. Hit the 'Add' Server Configuration, selected Cardav, and entered the remote URL provided by Mailfence.com 4. The Server Configuration box populates, so there is a connection, but it never connects after hitting the OK button when performing a refresh in Kontact/Kmail, etc. OBSERVED RESULT No Caldav/Cardav connection, kind of a time-out situation. EXPECTED RESULT For it to fetch and push contact and calendar information SOFTWARE/OS VERSIONS Operating System: EndeavourOS KDE Plasma Version: 5.22.4 KDE Frameworks Version: 5.84.0 Qt Version: 5.15.2 Kernel Version: 5.13.8-zen2-1-zen (64-bit) Graphics Platform: X11 Processors: 6 × Intel® Core™ i5-9600K CPU @ 3.70GHz Memory: 15.6 GiB of RAM Graphics Processor: NVIDIA GeForce GTX 1660 SUPER/PCIe/SSE2 ADDITIONAL INFORMATION
I forgot to add, using Thunderbird's add-on for caldav/cardav called TbSync, it works fine with Mailfence.com's protocol.
Confirmed with 5.18.40. KOrganizer puts up a "site does not require authentication" dialog. Stderr contains parse error from icalcomponent_new_from_string. string= "<!doctype html><html lang=\"en\"><head><title>HTTP Status 401 â\u0080\u0093 Unauthorized</title><style type=\"text/css\">body {font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b {color:white;background-color:#525D76;} h1 {font-size:22px;} h2 {font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;} .line {height:1px;background-color:#525D76;border:none;}</style></head><body><h1>HTTP Status 401 â\u0080\u0093 Unauthorized</h1></body></html>" org.kde.pim.davresource: DavGroupwareResource::onItemFetched: Failed to parse item data. "http://mailfence.com/dav/«me»/private/events/1628468727.R649.ics"
Possibly related: https://bugs.kde.org/show_bug.cgi?id=434757