On Tue, 4 Feb 2014, Denys Vlasenko wrote:
I am looking at Fedora's "man sendmail" and it says that -fSENDER
is optional. When it's absent, sender is derived from "From:" header.
Verbatim quote from the man page:
"Sets the name of the 'from' person (i.e., the envelope sender of the
mail). This address may also be used in the From: header if that header
is missing during initial submission."
So it says that the argument of -f is used as the default value for the
From header, not vice versa.
Looking at the code, sendmail seems to behave pretty much like the patch I
sent earlier, i.e. derive the envelope sender address from the current
user's login name and the host's FQDN.
BR,
Kaarle
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