Sender domain must exist

David Spigelman dspigelm at
Mon Nov 22 14:24:57 UTC 1999

Then it sounds like it was *their* domains that have the problem. I know
that I was having that problem with some of my domains for a little while.
It was largely because some of the domain files were not set up correctly,
on my part. There were errors that BIND 4 didn't detect, but BIND 8 wouldn't
allow. I had to correct those errors before it would work properly. Perhaps
the admins of those domains are experiencing that same problems (or perhaps
your users were trying to send to me <grin>).


David Spigelman
Network Administrator
American Center for Physics

>>> "Olaf Ihmig" <oihmig at> 11/22 6:07 AM >>>

On 22.11.99 10:52:42 Rony Gabriel  wrote:
>is your domain listed on the dns? if not, then thats the reason.
>if yes, then you are not properly masquearding the mails to reflect the
>listed domain name.

these are not our domains. from time to time there are some domains with
this errormessage. its not happen on every day, only some. we got mails
from these and send mail to these domains. its a curios phenomenon.

>| Hi,
>| from time to time mails are blocked from our mailserver ( sendmail
>| with errormessage "Sender domain must exist". Problem is, i am sure,
>| domain  exist. Our BIND-Version is 8.1.2.
>| Any ideas whats wrong?
>| Thanx.
>| Olaf Ihmig.

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