[Mailman-Users] All recipients refused - Hostname required

[Terry Rossi]

After upgrading to 2.1.1 I cannot seem to send to my list anymore. The
stmp-failure log is full of 

Feb 25 21:32:35 2003 (95755) delivery to xxxxxxxx at pics.com failed with
code 553:
 5.1.3 <pics-mail-bounces+cbordash=pics.com@>... Hostname required
Feb 25 21:32:35 2003 (95755) delivery to tttttt at pics.com failed with
code 553: 5.
1.3 <pics-mail-bounces+bklaw=pics.com@>... Hostname required

Any help would be most appreciated.


Thanks

Terry