Email rejected from one account on server, but not another

GoWilkes

Well-Known Member
Sep 26, 2006
611
24
168
cPanel Access Level
Root Administrator
I'm having a rather confusing problem. I have several hosting accounts on my server, but I'm specifically going to refer to www.mydomain.com, www.primary-host.com, and www.secondary-host.com.

Let me apologize in advance if this post is confusing. I felt like I needed to give a lot of detail, though, because it's a confusing problem to have!

The problem is that when www.primary-host.com or www.secondary-host.com emails people on certain ISPs, they get a notice that the email was rejected, but when I email them through www.mydomain.com, it goes through just fine. Primary-host.com and secondary-host.com are owned by the same client, and are used on the same computers.

Primary-host.com has about 75 POP accounts created, and is on the same IP as Mydomain.com. Secondary-host.com only has 4 or 5 POP accounts, and is on the same server, but with a different IP. The client has an internal network that I was sure was causing the problem, but I tried logging in to their Webmail and sending a test email, and it still bounced! Now I'm completely at a loss.

I asked another client on the same IP to send a test email to one of the addresses that had bounced, and they had no errors reported, either.

All 3 accounts have the same SPF record:

mydomain.com. 14400 IN TXT "v=spf1 a mx ~all"
primary-host.com. 14400 IN TXT "v=spf1 a mx ~all"
secondary-host.com. 14400 IN TXT "v=spf1 a mx ~all"

The problem is currently occurring with bellsouth.net and sbcglobal.net; both owned by AT&T. I suspect that it will occur with all AT&T owned addresses, if not others. The error message from Bellsouth stated:

host gateway-f2.isp.att.net [XXX.XXX.11.16]: 550-XX.XX.XX.XXX blocked
by ldap:eek:u=rblmx,dc=bellsouth,dc=net
550 Error - Blocked for abuse.

And the error message from SBCGlobal.net stated:

host sbcmx6.prodigy.net [XXX.XXX.36.20]: 553 5.3.0 nlpi076,DNSBL:521< XX.XX.XX.XXX_is_blocked.__For_information_see_http://worldnet.att.net/general-info/bls_info/block_inquiry.html


Note that I typed the XX.XX.XX.XXX in place of the actual IP. In the recipients IP, the XXX.XXX is the same for both headers, but the last 2 sectors are different.

I've checked all of the blacklists, and this IP isn't listed. And as I said before, I could email the same recipients with mydomain.com with no problems.

I'm kind of at a loss on where to go from here! Any suggestions?

TIA,

Jason


PS, I did submit an unblock request yesterday, but since it doesn't appear to be the entire IP that's blocked, I don't think it will help.
 

Serra

Well-Known Member
Oct 27, 2005
266
18
168
Florida
Actually, I'm having the same exact problem. I'm trying to resolve it, but there doesn't seem to be anything wrong with my setup.
 

GoWilkes

Well-Known Member
Sep 26, 2006
611
24
168
cPanel Access Level
Root Administrator
Well, Serra, if no one else is reporting the problem, then somehow it's just me and you!

Are you only having problems with AT&T subsidiaries, like me, or with a different ISP?
 
Mar 27, 2007
14
0
151
Chile
cPanel Access Level
DataCenter Provider
Twitter
i have the same issues

Asunto: Mail delivery failed: returning message to sender

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

[email protected]
SMTP error from remote mail server after MAIL FROM:<[email protected]>:
host sbcmx2.prodigy.net [207.115.20.21]: 553 5.3.0 flpi191 -
mBFEoRrc013851, DNSBL:521< 174.36.192.50
> >_is_blocked.__For_information_see_http://att.net/blocks

------ This is a copy of the message, including all the headers. ------