DreamHost

It seems that Comcast is blocking DreamHost’s outgoing MTA:

This is the Postfix program at host spunkymail-a8.dreamhost.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

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

The Postfix program

<xxxxxxxx@comcast.net>: host gateway-r.comcast.net[204.127.198.26] said: 550
208.97.132.60 blocked by ldap:ou=rblmx,dc=comcast,dc=net -> BL004 Blocked
for spam. Please see
http://www.comcast.net/help/faq/index.jsp?faq=SecurityMail_Policy18628 (in
reply to MAIL FROM command)
Reporting-MTA: dns; spunkymail-a8.dreamhost.com
X-Postfix-Queue-ID: 4AFED10AA74
X-Postfix-Sender: rfc822; c0nsumer@nuxx.net
Arrival-Date: Mon, 28 Aug 2006 19:03:22 -0700 (PDT)

Final-Recipient: rfc822; xxxxxxxx@comcast.net
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host gateway-r.comcast.net[204.127.198.26] said:
550 208.97.132.60 blocked by ldap:ou=rblmx,dc=comcast,dc=net -> BL004
Blocked for spam. Please see
http://www.comcast.net/help/faq/index.jsp?faq=SecurityMail_Policy18628 (in
reply to MAIL FROM command)

UPDATE: A bit more info. The Comcast page in the link above directs users to Symantec (yes, SYMANTEC) to report misidentified messages. It seems that Comcast now uses Brightmail for filtering.

I ssh’d to DreamHost and manually sent a message to a Comcast address (you know, the old ‘telnet mailhost 25’ thing) without problem. This was from jawbreaker.dreamhost.com, indicating that it’s not nuxx.net nor all of DreamHost which is blocked, just (at least one of) the MXs.

I filled out a trouble ticket with DreamHost, because they are the ones who will need to resolve this.

Hrm, I just tried to mail ‘s Comcast address and that worked. This is odd.

UPDATE 2: Now I’m not seeing any problems at all.