@tig said:
Lately gmail and its derivatives have blocked most kinds of 'compressed files'...
So RBZ, Layout, SKM files and possibly others can't be attached to emails [e.g. ZIP].
Even if you use another suffix and tell the recipient to rename it receipt, it gets spotted !
The 'header' is read of every attached file.
Perhaps SKP files are now subject to similar draconian measures ??Use DropBox or something similar...
I stand corrected then, it has been a while since I used Gmail.