[Mailman-Users] Temporary local problem - please try later

[J.R. Constance]

I am seeing the following error in my smtp-failure log

Nov 12 18:33:44 2006 (18367) All recipients refused:  
{'jrc at rodricon.com': (451, 'Temporary local problem - please try  
later')}, msgid: <mailman.1.1163260804.9656.constituent-society- 
leadership_ascls-lists.org at ascls-lists.org>
Nov 12 18:33:44 2006 (18367) delivery to jrc at rodricon.com failed with  
code 451: Temporary local problem - please try later

I have something like 180000 lines in the failure log either with  
this 451 error or with s. Any idea what could be causing this?

Thanks,

J.R. Constance