
Heads up on operational problem! ==== Subject: Delivery Status Notification (Failure) Date: Wed, 25 Apr 2007 06:56:24 -0700 (PDT) From: Mail Delivery Subsystem <mailer-daemon@googlemail.com> To: William.Allen.Simpson@gmail.com This is an automatically generated Delivery Status Notification Delivery to the following recipient failed permanently: XXXXXXXX@comcast.net Technical details of permanent failure: PERM_FAILURE: SMTP Error (state 8): 550 72.14.246.249 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 ==== Mail to Comcast is rejected and is returned with an error message containing the code BL004. What does this mean? Our filters have determined that email from your mail server has been sent in patterns which are characteristic of spam. In an effort to protect subscribers, your mail server has been blocked from sending email to the Comcast network. Mail servers are typically shared by many users so it may be the case that another party using your mail server has sent spam, even if you have not. ....

On 4/25/07, William Allen Simpson <william.allen.simpson@gmail.com> wrote:
Heads up on operational problem!
Comcast has an easy-off blacklist. It's pretty easy as these things go. http://www.comcastsupport.com/sdcxuser/lachat/user/Blockedprovider.asp Since it's impacting you personally, it might behoove you to fill out this form. They do have an option that says "I am a user at that domain." It may still result in the IP being delisted. Even though I'm a Gmail user, I'm not anti-Comcast over this; Gmail does some things at odds with abuse prevention best practices. For example, hiding the source IP of users using their webmail. Makes it very hard for receivers to see through the last hop and block or filter /only/ the bad mail. Regards, Al Iverson -- Al Iverson on Spam and Deliverabilty, see http://www.spamresource.com News, stats, info, and commentary on blacklists: http://www.dnsbl.com My personal website: http://www.aliverson.com -- Chicago, IL, USA
participants (3)
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Al Iverson
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Paul Vixie
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William Allen Simpson