A common defense against mail-abuse for the receiving server to validate
the sending server in DNS.
Somebody was futzing around either with HOF's zone file or CF-talk list's
setting and broke it:
# dig hof001.houseoffusion.com a
; <<>> DiG 8.3 <<>> hof001.houseoffusion.com a
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 4
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUERY SECTION:
;; hof001.houseoffusion.com, type = A, class = IN
;; AUTHORITY SECTION:
houseoffusion.com. 3H IN SOA trinity.cfhosting.net.
hostmaster.cfhosting.net. (
2001100101 ; serial
3H ; refresh
15M ; retry
1W ; expiry
... so starting overnight Fri-Sat, we can't receive cf-talk:
>Date: Sat, 23 Feb 2002 04:39:00 +0100 (CET)
>From: [EMAIL PROTECTED] (Mail Delivery System)
>To: [EMAIL PROTECTED] (Postmaster)
>Subject: Postfix Relay Hub SMTP server: errors from
>houseoffusion.com[64.118.64.245]
>X-Virus-Scanned: by VirusGate.MEIway.com
>
>Transcript of session follows.
>
> Out: 220 mgw1.MEIway.com - ESMTP - Postfix Relay Hub - ATTN: UCE trespassers
> will be pursued.
> In: EHLO hof001.houseoffusion.com
> Out: 250-mgw1.MEIway.com
> Out: 250-PIPELINING
> Out: 250-SIZE 40000000
> Out: 250-ETRN
> Out: 250 8BITMIME
> In: MAIL FROM:<[EMAIL PROTECTED]> SIZE=2556
> Out: 250 Ok
> In: RCPT TO:<[EMAIL PROTECTED]>
> Out: 554 <hof001.houseoffusion.com>: Helo command rejected: Host not found
> In: RSET
> Out: 250 Ok
> In: QUIT
> Out: 221 Bye
>
>No message was collected successfully.
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