Emails from a batch file

You will need to qualify this request a little better. Do you mean send a particular email en-masse to a lot of users. You can try Groupmail for that.
If you need to send some specific info that is generated by a batch file on a server that runs IIS you can try the foll commands in a batch file. In either case will watch for updates on this thread

rem Step one is to get the mail header into the output file
echo To:receive@somewhere.com > file.txt
echo From:sender@somewhere.com>>file.txt
echo Subject:The subject here>>file.txt

rem Step two is to put the text of the email here for instance the user list
echo Users on %COMPUTERNAME% >> file.txt
net user >> file.txt

rem Step 3 transfers the output tothe mail pickup directory
move file.txt c:\inetpub\mailroot\pickup

You didn't say anything about your environment but in the Exchange environment, you can use the MAPISEND utility from the BackOffice Resource Kit.

In the Linux environment, there is a command-line option of SENDMAIL you can use.

paul

As an addition to Answer 2:

To use MAPISEND.exe you need Exchange client installed (Outlook is OK to). Switches are following:
-u - Profile name (user mailbox) of sender
-p - Login password
-i - Interactive login (prompts for profile and password)
-r - Recipient(s), multiples must be separated by ;
-c - cc: list
-s - subject
-m - contents of message (ignored if -t exists)
-t - path to text file to be used as content
-f - path to attachment

If parameter is more than one word it should be nclosed in quotes