I had a bit of trouble with my installation on friday. Please add a test
to the bottom of lib/TWiki/Net.pm the Net::SMTP->new can fail. This failure
does not give any good error messages. I got the failure when I forgot to set my smtp mail server and the SMTP server could not find a server with the default name.
I worry about checks on other library and system calls. Please
verify that there are checks in place for all system and library calls which can fail.