[Exim] HOWTO: receiver_verify and suffixes

I am allowing <localuser>-[anything] with the folllowing but it requires
a .forward with the localuser in it

Thus to send mail to JoeUser-sometag@???

Joe must have a .forward with JoeUser in his homedirectory. Tt works
but seems a bit like a hack.

This is done with the following director

userforward:
no_verify
suffix = "-*"
suffix_optional
driver = forwardfile
file_transport = address_file
pipe_transport = address_pipe
reply_transport = address_reply
check_ancestor
file = .forward
modemask = 002
filter
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1. Can the above be done without the .forward hack? How?
2. Can receiver_verify be set to True? Currently -asdl is rejected if
receiver_verify is true.