Hi,
> > The string "localhost is always allowed." can be found in libspf2.a
> So this is wanted by exim! I did not check what SPF specs say about it, but
libspf2 is the library, Exim links against. So this is probably a
default, Exim relies on.
> this would mean, my local users CAN forge sender addresses?! Does this make
> sense?!
Local users on your MX (Mail In, SPF checking host), yes (if I do not miss anything). Do
you have any local users there?
The RFC does not seem to mention localhost specifically, but libspf2 seems
do do something like:
/* Give localhost a free ride */
if (SPF_request_is_loopback(spf_request))
return SPF_i_done(*spf_responsep, SPF_RESULT_PASS,
SPF_REASON_LOCALHOST, SPF_E_SUCCESS);
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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