On Thu, Sep 15, 2005 at 01:46:17PM +0200, Scott Ryan wrote: > This one time, at band camp, Claudio Jeker wrote: > > On Thu, Sep 15, 2005 at 11:06:47AM +0200, Scott Ryan wrote: > > > Is the spf patch included in qmail-ldap? I see that there is something > > > similar in the badmailfrom_unknown. > > > > > > > No we do not support SPF and we think it is a bad thing to support anyway. > > Just out of interest, why is it a bad thing to support?
It tries to solve an issue that is not solvable. Spoofing of email addresses is one key feature of the SMTP protocol. Forwarding does this, secondary MX need this and people traveling around suffer if they can't "spoof" their on address. This results in a situation where many ISPs need to add SPF rules that are so generic that you could drop them directly. So in the and you add a complex level to your SMTP server that gains you nothing. -- :wq Claudio
