🚀 go-pugleaf

I just tried the following trick and am now trying to determine just what
I've figured out.  I created a file with a To: line and a From: line, and
executed the following command:

/usr/lib/sendmail -t -d21.2 < testletter

The file contains:
] To: recipient@rhost
] From: sender@shost

In short, I don't understand what happens when it's generating the From:
address.  Note that my account name is "msir".  As for the To: address,
that seems pretty clear.  Any comments are quite welcome.

Here are the results.  Note that S6 and S5 are defined by me; they are
called from S3.  I've broken it up into parts that I can see.  I also added
the "] " at the beginning of each line.

Version number; this is under SunOS 3.5.
] Version 3.2

This section appears to be generating the From: address.  It would seem
that the From: address goes 3-0-2-4-3-1-4.  Strange...  Don't know why it
goes through zero, or why it goes through twice...  Perhaps this is
generating two different addresses - envelope sender and header sender?
] rewrite: ruleset  3   input: "msir"
] rewrite: ruleset  5   input: "msir"
] rewrite: ruleset  5 returns: "msir"
] rewrite: ruleset  3 returns: "msir"
] rewrite: ruleset  0   input: "msir"
] rewrite: ruleset  0 returns: "^V" "local" "^X" "msir"
] rewrite: ruleset  2   input: "msir"
] rewrite: ruleset  2 returns: "msir"
] rewrite: ruleset  4   input: "msir"
] rewrite: ruleset  4 returns: "msir"
] rewrite: ruleset  3   input: "msir"
] rewrite: ruleset  5   input: "msir"
] rewrite: ruleset  5 returns: "msir"
] rewrite: ruleset  3 returns: "msir"
] rewrite: ruleset  1   input: "msir"
] rewrite: ruleset  1 returns: "msir"
] rewrite: ruleset  4   input: "msir"
] rewrite: ruleset  4 returns: "msir"

This section seems to be generating the recipient address.  Note that the
local-part goes through 2-[R=]-4; this answers some recent questions.
] rewrite: ruleset  3   input: "recipient" "@" "rhost"
] rewrite: ruleset  5   input: "recipient" "@" "rhost"
] rewrite: ruleset  6   input: "recipient" "<" "@" "rhost" ">"
] rewrite: ruleset  6 returns: "recipient" "<" "@" "rhost" ">"
] rewrite: ruleset  5 returns: "recipient" "<" "@" "rhost" ">"
] rewrite: ruleset  3 returns: "recipient" "<" "@" "rhost" ">"
] rewrite: ruleset  0   input: "recipient" "<" "@" "rhost" ">"
] rewrite: ruleset  0 returns: "^V" "tcp" "^W" "rhost" "^X" "recipient" "<" "@" "rhost" ">"
] rewrite: ruleset  2   input: "recipient" "<" "@" "rhost" ">"
] rewrite: ruleset  2 returns: "recipient" "@" "rhost"
] rewrite: ruleset 14   input: "recipient" "@" "rhost"
] rewrite: ruleset 14 returns: "recipient" "@" "rhost"
] rewrite: ruleset  4   input: "recipient" "@" "rhost"
] rewrite: ruleset  4 returns: "recipient" "@" "rhost"
-- 
Mark Sirota - University of Rochester, Rochester, NY
 Internet: msir@cc.rochester.edu
 Bitnet:   msir_ss@uordbv.bitnet
 UUCP:     ...!rochester!ur-cc!msir