Marcus Bointon:
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> On 3 Feb 2015, at 17:48, Viktor Dukhovni <postfix-us...@dukhovni.org> wrote:
> >
> > Actually, DO put a space in. Some day you'll write a shell script
> > of the form:
> >
> > /usr/sbin/sendmail -f "$sender" ...
> >
> > which will work even when the sender address is empty, the non-space
> > variant will break:
> >
> > /usr/sbin/sendmail -f"$sender" ...
>
> This isn't a typical shell script - it's called from PHP internals,
Email sometimes has the null sender address (delivery status notifications,
bounces, delayed mail warnings). With the form:
/usr/sbin/sendmail -f"$sender" otherstuff
it is exactly as if Postfix was invoked like this:
/usr/sbin/sendmail -f otherstuff
And that would be wrong. This is why a space is needed between
the -f and the sender argument.
Wietse
