I can't figure out why exim is quering what appears to be the wrong mailservers 
during sender callouts for jpmorgan.com
 
Here's the logs, it's querying 170.148.48.190, now i can't find where it pulled 
that from.
 
2008-08-04 18:12:13 H=sb4.jpmchase.com [170.148.48.190] sender verify fail for 
<[EMAIL PROTECTED]>
2008-08-04 18:12:13 H=sb4.jpmchase.com [170.148.48.190] F=<[EMAIL PROTECTED]> 
rejected RCPT <[EMAIL PROTECTED]>: Sender verify failed
 

To check manually I do a mx lookup for jpmorgan.com
>dig mx jpmorgan.com
 
and get
>jpmorgan.com.           600     IN      MX      10 mxe.jpmchase.com.
>jpmorgan.com.           600     IN      MX      10 mxi.jpmchase.com.
 

I open a telnet connection to either of those hosts and do a callout and it 
works fine, so I try connecting to sb4.jpmchase.com and i'm not allowed to 
connect to it.  I look at all the IPs mxe and mxi resolve too and there's 
nothing near sb4.jpmchase.com[170.148.48.190]
 
So my question is, how exactly does exim decide who to callout to?  I didn't 
get any indication of a redirect when verifying with the mailservers in the MX 
reply for the domain.
 
telnet mxe.jpmchase.com 25
Connected to mxe.jpmchase.com (159.53.46.185).
Escape character is '^]'.
220 ime6.jpmchase.com
HELO mailserver.ourdomain.com
250 +OK SMTP server Ready
MAIL FROM:<>
250 +OK Sender OK
RCPT TO:[EMAIL PROTECTED] 
250 +OK Recipient OK
 
telnet mxe.jpmchase.com 25
Trying 159.53.46.185...
Connected to mxe.jpmchase.com (159.53.46.185).
Escape character is '^]'.
220 ime6.jpmchase.com
HELO mailserver.ourdomain.com
250 +OK SMTP server Ready
MAIL FROM:<>
250 +OK Sender OK
RCPT TO:[EMAIL PROTECTED] 
550 Mailbox unavailable or access denied - <[EMAIL PROTECTED]>
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