--On May 19, 2008 10:15:25 PM -0400 Sahil Tandon <[EMAIL PROTECTED]> wrote:
On May 19, 2008, at 4:17 PM, Montag wrote:
host mx1.free.bsd.org said: my.mywebsite.com: Helo command rejected:
Are you sure it wasn't mx1.freebsd.org? And are you mangling
my.mywebsite.com or is that really the hostname with which your server
is configured to EHLO/HELO? The FreeBSD MXs also run Postfix and
employ the reject_unknown_helo_hostname restriction; it rejects HELO
and EHLO hostnames that lack DNS A or MX records. Your log excerpt
looks suspicious because my.mywebsite.com does have a valid DNS A
record:
my.mywebsite.com. 96 IN A 208.87.33.150
Yes, but this is a bit weird.
Macintosh:~ pauls$ telnet my.mywebsite.com 25
Trying 209.181.247.105...
Connected to nullmx.mywebsite.com.
Escape character is '^]'.
220 nullmx SMTP
EHLO testing.mydomain.com
220 Hello
quit
220 Buh-bye!
Connection closed by foreign host
Why "nullmx.mywebsite.com"? Which resolves to an entirely different IP
address.
Macintosh:~ pauls$ dig +short nullmx.mywebsite.com
209.181.247.105
But it *is* the MX for that domain.
Macintosh:~ pauls$ dig -t MX mywebsite.com
; <<>> DiG 9.4.1-P1 <<>> -t MX mywebsite.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49578
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 3
;; QUESTION SECTION:
;mywebsite.com. IN MX
;; ANSWER SECTION:
mywebsite.com. 300 IN MX 10 nullmx.mywebsite.com.
So I've got no idea why he's having this problem, unless it's because the
MX record doesn't point to my.mywebsite.com.
Paul Schmehl ([EMAIL PROTECTED])
Senior Information Security Analyst
The University of Texas at Dallas
http://www.utdallas.edu/ir/security/
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