Why does issue creation by email sometimes doesn't work?
Under which conditions an incoming email does create an project issue and when not?
In general, the feature works for me, but it seems, that if internal users write an email to
firstname.lastname@example.org no issue is created, only when external customers write to this address. The email ends up, however, in the system, e.g. one can see it in the archive, including attachments. Is this a wrong configuration on my side?