Send java mail throws KM - problems sendMail

Question

Hellow
I implementing the Java send mail post in
send mail throws NoClassDefFoundError: javax/mail/MessagingE
But I have a little problem with the sentence:
<b>sendMailSvc.sendMail(mailItem, iuser);</b>
The stranger is that NetWeaver protests to me that:
<i>The Method sendMail(IResource, IUser) in the type ISendMailService is not applicable for the arguments (ISendMailItems, IUser)</i>
But in the class, NetWeaver showme sendMailSvc.(Ctrl+Space) two Method send mail
1) sendMail(IResource arg0, IUser arg1)
2) sendMail(ISendMailItem arg0, IUser arg1)
Why it does not take the second method? I do not understand
Regards !!

Answer 1

Thanks Detlev for your answer
I  import IUser from :
<b>import com.sap.security.api.IUser;</b>
and initialize the variable user :
<b>     IWDClientUser user;
     IUser iuser = user.getSAPUser();</b>
but you say to me that it would have to use:
<b>import com.sapportals.portal.security.usermanagement.IUser;</b>
how I can initialize the variable "user" for:?
<i>ISendMailItem mailItem = null;
               try {
                         mailItem = sendMailSvc.createMailItem();
                         mailItem.setContent("Test");
                         mailItem.setTo("[email protected]");
                         <b>sendMailSvc.sendMail(mailItem, user);</b></i>     
Regards for your help !!!