On Wed, 09 Jul 2014 08:54:08 -0400 Kevin A. McGrail wrote: > On 7/9/2014 1:00 AM, Sergio wrote: > > It seems that my rule using "Received" instead of "From" did the > > trick, the rule is working now. > Sergio, > > The format of that email address is likely verp or some related > format that encodes the recipient in the From address so that bounces > can be processed > (http://en.wikipedia.org/wiki/Variable_envelope_return_path). > > This rule will block a significant number of legitimate mailing lists.
VERP and similar schemes work on the envelope, so checking the From header should relatively safe.
