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Today I learned that if you are running qmail with the SMTP Authentication patch through tcpserver, you have to invoke qmail-smtpd with 3 parameters:  hostname, check program, and subprogram.  If you don’t invoke it with those 3 arguments, it will successfully authenticate any user/pass combination.

I realize that this post means nothing to 99.5% of the people who read this blog, but I figured I’d throw it in a post just in case it ends up in search engines and helps somebody out of a tough spot.  Here is my source on this.