[cobalt-users] strange problem receiving mail -- please help

["RefHost Limited" <cobalt@xxxxxxxxxxx>]

We're getting a strange problem RECEIVING mail on one of our Raq 4's.

Nothing was changed, and suddenly overnight all of the siteadmin's pages
returned 'file not found'

The server was still up and server was still serving webpages, but the mail
server couldn't receive emails (can send fine)

Yet I can send to some email accounts on the server... but i wasn't able to
create new mail accounts either... it just seems like the mail server's
database is corrupt...

anyone any ideas? really would appreciate some help as I don't know how to
fix it and there's lots of clients on that server...

test3@xxxxxxxxxxxxxxxxxxx is a test account hosted on the Raq 4.

here's what happens when I send from a 3rd party account to
test3@xxxxxxxxxxxxxxxxxxx

test3@xxxxxxxxxxxxxxxxxxx
Delivery failed
550 5.7.1 <test3@xxxxxxxxxxxxxxxxxxx>... Relaying denied. IP name lookup
failed [217.158.42.10]



here's what happens when I send from another 3rd party email account to
test3@xxxxxxxxxxxxxxxxxxx:

<test3@xxxxxxxxxxxxxxxxxxx>:
217.158.42.18 does not like recipient.
Remote host said: 550 5.7.1 <test3@xxxxxxxxxxxxxxxxxxx>... Relaying denied.
Please check your mail first.
Giving up.

here's what happens when I send from test3@xxxxxxxxxxxxxxxxxxx account to
itself test3@xxxxxxxxxxxxxxxxxxx:

   ----- The following addresses had permanent fatal errors -----
<test3@xxxxxxxxxxxxxxxxxxx>
    (reason: system config error)

   ----- Transcript of session follows -----
553 5.3.5 mail.web-site-gold.co.uk. config error: mail loops back to me (MX
problem?)
554 5.3.5 <test3@xxxxxxxxxxxxxxxxxxx>... Local configuration error



Steve