Ubuntu list bounces?

[Patrick Asselman]

 On Thu, 05 Apr 2012 10:08:58 -0400, Dave Woyciesjes wrote:
> Well, it appears that SBCGlobal.net is blocking the Ubuntu mailing 
> server:
>
> host sbcmx1.prodigy.net [207.115.21.20]: 553 5.3.0 flph259 DNSBL:RBL
> 521< 91.189.94.204 
> >_is_blocked.__For_information_see_http://att.net/blocks
>
> For any other affected users, you can also submit a unblock request 
> here:
>
> http://rbl.att.net/end_user_request1.html
>

 According to http://rbl.att.net/block_enduser.html the 521 error is due 
 to:
 "The sending system has been identified as a source of spam."

 I can't say I totally disagree with that :-P

 Best regards,
 Patrick Asselman