Re^2: securing a remailer

[geektron]

in reply to Re: securing a remailer
in thread securing a remailer

if user input isn't validated/untainted, newlines can be passed into the input, allowing someone to hijack the script and use it as a spam-remailer.

sure, if you're not accepting user input you could get away with it, but i don't recommend it.

[sgifford]

So the solution is to validate user input. No need to throw the baby out with the bathwater. You'd have similar problems with using unvalidated input with SMTP or any other mechanism for sending mail.

Still, if the OP finds they can replace a significant chunk of their code with a well-maintained Perl module, that seems like a pretty clear good idea.