Basically no mails will be sent after integrations - the only thing I've been able to find in the console that seems like it would be related is this message from kernel: Sandbox: node(75477) deny(1) network-outbound*:25 The smtp that is setup works fine when accessed from Mail on the same computer buildService.log for an integration indicates that triggers have been run and does not list any errors Apart from the update to macOS 11.1 (from 10.15.x) Xcode was also updated to 12.3

It should be the simplest possible situation, none of the Swift code needs to be public and it also does not need to access the Objective-C++ code. Problem is of course that the Swift compiler insists on reading the umbrella header which references header files that include C++ code. In order to make it build I can conditionalize the umbrella header includes on __cplusplus but that leads to a lot of warnings about the umbrella header not including public files. And there doesn't seem to be a selective way to silence those warnings. Any way to tell the Swift compiler that it should not care about the umbrella header?