[Exim] screwed up servers

I was trying to sign up for a local job board (some of us could use
some honest work) and got this in my logs when they attempted to send
me my password:

Sep 15 09:37:17 vife exim: 2003-09-15 09:37:17 no host name found for
IP address 208.140.9.101
Sep 15 09:37:17 vife exim: 2003-09-15 09:37:17
H=(mail.pleasantonjobs.com) [208.140.9.101] sender verify fail for
<webmaster@???>: all relevant MX records point to non-
existent hosts

This is the only time I've had this particular problem. Is there
something I can change in my exim configuration that would allow this
through without opening up security holes?

Rossz
--
Fogalmam sincs, mi van ide írva.