Hi, I'm spending a lot of time reading the stuff at sendmail.org. I've found all kinds of explanations of the check_rcpt HACK, but no explanation as to where i put it. Does it go in sendmail.cf somewhere? Where? Does it get listed in sendmail.mc? But then how do i get the .m4 to relate to it? sendmail! argh ... universero trio... trio@tio.net... http://tio.net/~trio Learn and use The International Language Esperanto! http://esperanto.org