I was reviewing the bandwidth repports and saw that several domains that only have aliases setup, are sending over a 1000 messages a day..... I have disabled bouncing messages. But they still show up in the spool, as from system administrator as address was invalid.

Could not deliver message to the following recipient(s): xxx@domain.com

Relaying is set to nobody.
Content filter bouncing is disabled.
catch alls disabled.

Did you make a ticket about this? If so was it resolved?

-Ray