Problem send email alert Monitor Server

Hi everybody

I've one problem with ColdFusion 8 on 3 servers, installed in multi-server configuration.

When i want to monitor servers with sending alert by mail, i 've an error in mail.log file :

"cfadmin@server-name failed to route the address"

I've check smtp relai configuration. All is OK.

I've read somewhere in Adobe documentation that this parameter (mail from) canno't be configured. But in other ColdFusion plateform, alert email are sending by a personalized field "cfadmin@final_client_domain".

Moreover, last year, the final client tell me that alert email sending work well...

I 've tryed to find the file who let-me personalise this option. Have you an idea ?

Thanks.

PS.: sorry for my english level.