Pawe? Grzesik: > It's of course not a production code. I'm only trying to > learn and understand how exactly it works. > > I cannot find anything about "--" in the postfix documentation > (or I'm looking on the wrong page?). There is any explanation > somewhere? (instead of at the source code).
Look at "man getopt" the, i.e. the SYSTEM LIBRARY function that parses command-line options. Without the '--' before the recipients, a recipient address starting with '-' would change the way that the sendmail command works. Wietse