Hi, I had a look at the relevant code - qmail is just receiving the info via env vars. So it might be possible to get the effect by calling qmail-smtpd from inetd rather than from the tcpserver program, or a broken implementation of setting env vars, or by adding an rblsmtpd type process that unsets the environment
Wolfgang Hamann >> At 12:28 PM 12/10/2005, you wrote: >> >> >> > >> > >> > >> > You've obviously never seen what kind of mess an >> > "out-of-the-box" >> > >> >qmail can do to *destroy* mail headers: >> > >> > >> > >> >Received: from unknown (HELO lh) (unknown) >> > >> > by unknown with SMTP; 4 Dec 2005 04:01:40 -0000 >> > >> >... >> > >> >> > >> >> > >> That really makes me wonder if DJB is intentionally trying to make plain >> > >> qmail an unusable POS so that nobody will be able to use it without >> > >> patching. Or is it a purely accidental side effect? >> > >> >> > >> Any MTA that can ever fail to report the local hostname in the "by" >> > clause >> > >> scares me. Ditto for the source IP delivering mail (in the case of >> > >> SMTP). >> > >> >> > >> It should at least be really hard to misconfigure an MTA to the point it >> > >> does that. Like hacking the source code hard, or at least mucking around >> > >> with several options the manpage or conf file warn you not to touch. >> > >> >> > >> >> >Hi, >> > >> >DJB provides an installation procedure ... and some of thosewho package up >> >qmail >> >binary packages provide different ones. >> >The DJB procedure wants to - eeither - autodetect the hostname - or - >> >receive one on the >> >commandline. >> >Further, qmail definitely consults DNS even if /etc/hosts entries are >> >present. >> > >> >I have never seen a "received by unknown" on any machine that runs qmail >> >fior me. >> >Although I an running patched versions, I dont think that adding, e.g., >> >tlsor qmail-scanner would have "fixed" >> >the problem you mention >> >> >> Well, you might not have it. But a little googling shows the problem is >> fairly common. >> >> http://www.google.com/search?q=received+%22by+unknown%22+qmail >> >> That said I can find no reference as to what kind of misconfiguration >> causes this. I can just find a lot of instances of it. >> >> >>
