As already started in this thread:
I am using a Fairphone 2 with Fairphone Open, GApps, XPrivacy and AFWall+.
Because of the missing delivery reports I’ve stopped using the stock SMS/MMS app and replaced it with QKSMS.
When trying to send MMS with it, I’ve only been able to do that when switching off the WLAN and switching on mobile data (QKSMS said it would be able to do that automatically!). In order to send MMS, I had to unblock the following app in my AFWall:
Google Play-Dienste, Google Dienste-Framework, Google Account Manager, Google Backup Transport
This already is disturbing enough for me, but I still cannot receive MMS. Is there any tiny piece of configuration I have to change?