[Greylist-users] t-mobile

[Barb Dijker]

FYI...

T-mobile apparently does transparent proxy of outgoing smtp for their 
users... and immediately bounces rather than retries on 451.  An 
example is attached.  This is a case we will not be adding to our 
whitelist.

Barb Dijker, x100
Netrack, Inc., 3080 Valmont Rd Ste 200, Boulder CO 80301
303.938.0188, toll free 1.888.9Netrack, fax 303.938.0177
www.netrack.net


-----Original Message-----
From: Mail Delivery System [mailto:MAILER-DAEMON at mailrelay.t-mobile.com]
Sent: Tuesday, January 11, 2005 9:01 AM
To: XXXXX at XXXXXX.com
Subject: Undelivered Mail Returned to Sender

This is the Postfix program at host mailrelay.t-mobile.com.

I'm sorry to have to inform you that your message could not be be 
delivered
to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can delete your 
own
text from the attached returned message.

			The Postfix program

<YYYYY at YYYYYY.com>: host www.YYYYYY.com[206.168.112.40] said: 451 4.7.1
     Please try again later (TEMPFAIL) (in reply to RCPT TO command)
Reporting-MTA: dns; mailrelay.t-mobile.com
X-Postfix-Queue-ID: 8894899D7
X-Postfix-Sender: rfc822; XXXXX at XXXXXX.com
Arrival-Date: Tue, 11 Jan 2005 11:01:18 -0600 (CST)

Final-Recipient: rfc822; YYYYY at YYYYYY.com
Action: failed
Status: 4.0.0
Diagnostic-Code: X-Postfix; host www.YYYYYY.com[206.168.112.40] said: 
451
     4.7.1 Please try again later (TEMPFAIL) (in reply to RCPT TO 
command)