mail confusion

[Robert Nichols]

Derek Martin wrote:
> On Sun, Nov 06, 2005 at 12:05:11PM -0600, Robert Nichols wrote:
> 
>>For root, you can't get away with just eliminating "root" as an
>>EXPOSED_USER in sendmail.mc and relying on MASQUERADE_DOMAIN because
>>that will result in translating root at localhost.localdomain" to
>>"root at some.real.host", which would be very wrong.
> 
> 
> This is absolutely true, positively.  Except that for Jay's purposes,
> it probably doesn't matter.  If he's only trying to send mail out to
> himself, and will be careful not to use the address for any other
> purpose (i.e. he doesn't intend to reply to the message) then it
> doesn't really matter what the address is, so long as it is a "valid"
> one (in this case, not localhost.localdomain, and probably something
> that's resolvable, depending on his ISP).
> 
> Strictly speaking, to solve Jay's problem, all that is really required
> is to make sendmail stop sending mail out as localhost.localdomain.  I
> believe that the easiest solution to that problem *should* be to just
> set LOCAL_DOMAIN to some reasonable value in the *.mc files, re-make
> the config files, and restart sendmail.  Even masquerading really
> shouldn't be necessary.

That would be true if the mail were being submitted from "root".  If the
submission is from "root at localhost.localdomain" then the bare minimum
requirement would be masquerading (without "root" as an EXPOSED_USER)
to map that to "root at something.else".  Without knowing exactly how the
mail is being submitted there's no way to know whether that would work.

-- 
Bob Nichols         Yes, "NOSPAM" is really part of my email address.