Code pulled with git from git:// with the last commit being 0558786

These are Current warnings for gen-smtp.

dialyzer -n -q -Wno_improper_lists ebin
gen_smtp_server.erl:130: Fun application with arguments (Configurations::nonempty_maybe_improper_list()) will never return since it differs in the 1st argument from the success typing arguments: ([])
smtp_server_example.erl:5: Callback info about the gen_smtp_server_session behaviour is not available