Getting 550: unrouteable mail domain (cs.com)

[joshdoe]

I have some users who are trying to receive email from username@cs.com addresses. They were not succeeding. I telnetted into cpanel16, and used various addresses with cs.com as the suffix. Everytime I got:


220-cpanel16.gzo.com ESMTP Exim 4.34 #1 Sun, 23 May 2004 15:56:29 -0500
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
helo cs.com
250 cpanel16.gzo.com Hello cs.com [162.xx.xx.xx]
mail from: <bobdylan@cs.com>
250 OK
rcpt to: <name@mydomain.com>
550-Verification failed for <bobdylan@cs.com>
550-unrouteable mail domain "cs.com"
550 Sender verify failed
quit
221 cpanel16.gzo.com closing connection


What's the problem here? I can succesfully send mail to two other servers using an @cs.com address, but not to my dathorn server. I googled for a while, but found nothing. Thanks

[Andy]

Did you submit a ticket?

[pulse8]

I am also getting this error for AOL.

[Buddha]

AOL MX record? What's up with that?

Header:
ID=17748, QR=Query, Opcode=QUERY, RCODE=NO ERROR
Authoritative Answer=Yes, Truncation=No
Recursion Desired=No, Recursion Available=No
QDCOUNT=1, ANCOUNT=4, NSCOUNT=2, ARCOUNT=2
Question:
Name=cs.com, QTYPE=MX, QCLASS=1
Answer Section:
- Name=cs.com
Type=MX, Class=1, TTL=3600 (1 Hour), RDLENGTH=21
Preference=15, Mail Exchange=mailin-02.mx.aol.com
- Name=cs.com
Type=MX, Class=1, TTL=3600 (1 Hour), RDLENGTH=14
Preference=15, Mail Exchange=mailin-03.mx.aol.com
- Name=cs.com
Type=MX, Class=1, TTL=3600 (1 Hour), RDLENGTH=14
Preference=15, Mail Exchange=mailin-04.mx.aol.com
- Name=cs.com
Type=MX, Class=1, TTL=3600 (1 Hour), RDLENGTH=14
Preference=15, Mail Exchange=mailin-01.mx.aol.com
Authority Records Section:
- Name=cs.com
Type=NS, Class=1, TTL=3600 (1 Hour), RDLENGTH=12
Name Server=dns-02.ns.cs.com
- Name=cs.com
Type=NS, Class=1, TTL=3600 (1 Hour), RDLENGTH=9
Name Server=dns-01.ns.cs.com
Additional Records Section:
- Name=dns-01.ns.cs.com
Type=A, Class=1, TTL=3600 (1 Hour), RDLENGTH=4
IP Address=152.163.159.235
- Name=dns-02.ns.cs.com
Type=A, Class=1, TTL=3600 (1 Hour), RDLENGTH=4
IP Address=205.188.157.235

[ ADDED ]Wonder if the fact no A record is returned for aol.com is screwing it up? Anyway, submit a trouble ticket and see if sender verification can be turned off? I think there's Exim switch somewhere.

[diver]

CS.COM is Compuserve, which is owned by AOL.

[Buddha]

CS.COM is Compuserve, which is owned by AOL.

Ohhh....that's some match there! Guess there's some news I try to avoid. Even when staring right at it!