I regularly get emails from "post+EXAMPLE@EXAMPLE.de", where I substituted "EXAMPLE" for privacy reasons. I don't have this email address in my address book. Still, a contact photo is displayed when I read mails from this address. The photo belongs to an unrelated contact with "post@ANOTHEREXAMPLE.de". If I remove the email address from the contact, kontact displays the photo of yet another contact with "post@YETANOTHEREXAMPLE.de". I guess the plus sign in the email address is the problem. Reproducible: Always
Indeed it's very wierd :) I add to my todo
Sounds like the problem is the same as in https://bugs.kde.org/show_bug.cgi?id=349727
This bug has never been confirmed for a KDE PIM version that is based on KDE Frameworks, except possibly a Technology Preview version 5.0.x. Those Framework-based versions differ significantly from the old 4.x series. Therefore, I plan to close it in around two or three months. In the meantime, it is set to WAITINGFORINFO to give reporters the opportunity to check if it is still valid. As soon as someone confirms it for a recent version (at least 5.1, ideally even more recent), I'll gladly reopen it. Please understand that we lack the manpower to triage bugs reported for versions almost two years beyond their end of life.
Just as announced in my last comment, I close this bug. If you encounter it again in a recent version (at least 5.1 aka 15.12; preferably much more recent), please open a new one unless it already exists. Thank you for all your input.