Why does Perl code written for Sendmail not work with Blat?
Blat is not a Win32 version of sendmail, and as such, you can not just change the sendmail calls in your Perl code to call Blat.exe Sendmail is an eMail Transfer Agent (MTA). Blat is the SMTP *sending* part of an eMail User Agent (MUA) or eMail client Check out the “What is Blat” part of this FAQ. (E)rrors One of the first things you want to do if you are having problems is use the -debug switch (you can also use the “-log logfile.log” switch to put the output in a file.