Bug#550981: Undelivered Mail Returned to Sender

[Julien Cristau <jcristau@debian.org>]

On Wed, Oct 14, 2009 at 20:15:42 +0200, Mail Delivery System wrote:

> <dbrazziel@snet.net>: host snetmx3.prodigy.net[207.115.20.24] said: 553 5.3.0
>     flpd124 - n9EIFfZx003955, DNSBL:ATTRBL 521< 91.121.16.100
>     >_is_blocked.__For_information_see_http://att.net/blocks (in reply to MAIL
>     FROM command)

sigh...