Other sections in this FAQ:
Perl
Exim built with Perl support exits with the error message ./exim: can't load library 'libperl.so.
Exim built with Perl support exits with several error messages of the form undefined reference to `PL_stack_sp.
When using ${perl, clients sometimes disconnect having been fed garbage. This is because perl's STDERR (where warnings generated by perl libraries go) is connected to the SMTP socket. How can I fix this?