Problem sending mail using JSTL

I am trying to send e-mail using JSTL. I have "taglibs-mailer.jar" (Version 1.1) in webapps/myApp/WEB-INF/lib. I also have "activation.jar" and "mail.jar" in C:\j2sdk1.4.2_03\lib and they are in classpath.
In my JSP I have following lines of code:
taglib uri="http://jakarta.apache.org/taglibs/mailer-1.1" prefix="mt"
c:if test="${pageContext.request.method=='POST'}"
c:set var= "email" value= " '${param.e_mail}' "
mt:mail server="myServer" to="${email}" from="eMailAddress" subject="Test mail"

mt:message>This is a test </mt:message
mt:send/
/mt:mail

The JSP itself doesn't show any error but the mail doesn't get delivered. I get an "Undeliverable mail" message from the server.
It says:
The following recipient(s) could not be reached:
${email}@myServer

How can I set a variable to the e-mail address and use that variable for sending the e-mail?
Thanks in advance.
Arun

Hmm. It looks to me as if you may be using the wrong "flavor" of JSTL.
JSTL comes in two types: one which expands ${expr} expressions in attribute text, and one which expands <%=expr%> expressions. You don't tell us which one you are using, so It might be worth trying the other form and see what happens.

Frank,
I didn't know about the two flavors of JSTL.
I downloaded the "jakarta-taglibs-standard-1.1.0-B1.zip " from "http://apache.webmeta.com/jakarta/taglibs/standard/binaries/" site. After unzipping I get two files "jstl.jar" and "standard.jar". How do I find out which type is supported in this distribution?
Perhaps I am completely off track. Should I instead download "Java Web Services Developer Pack 1.3 " from Sun site? As I see from the description that this contains quite a few components and wasn't sure I need all that.
Thanks in advance.
Regards
Arun