Well, you could setup a .forward. 

On the machine reciving mail:
\username, "|/usr/lib/sendmail username at host.com"

Or you could setup a procmail rule.

:0c:
#Carbon Copy to bzcat and append to mail Archive
| /usr/lib/sendmail username at host.com


-- 
| Andrew S. Zbikowski       | Home: 763.591.0977 |
| http://www.ringworld.org  | Work: 763.428.9119 |
| http://www.itouthouse.com | PCS:  612.306.6055 |
|   This message is protected by double ROT13    | 
|   encryption. Any attempt to circumvent the    |
|   digital protection is banned by the DMCA.    |
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