Hi.
I have a sendmail(MTA) at sms.sharif.edu
When sendmail receives an email,I want to it delivers a version of same email to another host.
But i don't know to how i do.
Please guide me.....
Yours,Mohsen.

you can configure the .forward file for each user. Strictly speaking I don't think it is the job of an MTA to forward mails.

I want to don't use .forward file.
In fact,I want to use more than a host.
This action is possible in qmail.
But i need to execute this action in sendmail.
If possible it,Please tell me.....

The only way that I can think of (there may be others) is make use of /etc/mail/virtusertable and/or /etc/aliases. You can control what sendmail does when it receives a mail. See the virtual hosting section on sendmail.org. Wildcards are allowed.

--virtusertable
@hoho.com local%1

--aliases

localbob bob@moo.com bob
localjoe joe@doo.com joe

something like that. Check sendmail.org to verify syntax.

What it is doing is when a mail arrives at bob@hoho.com then the virtusertable looks for "localbob" and localbob resolves to two addresses - bob on the same host and bob@moo.com.