groovy - Sending an email: no object DCH for MIME type multipart/mixed -

i'm trying send email using java code running groovyconsole. works fine when send email without attachments fails add in multipart logic attachments.

edit: i'm using javamail version 1.4.7

this error i'm getting.

javax.activation.unsupporteddatatypeexception: no object dch mime type multipart/mixed;   boundary="----=_part_16_24710054.1375885523061"  @ javax.activation.objectdatacontenthandler.writeto(datahandler.java:891) 

and it's happening on line transport.send(mimemsg) below.

import java.util.properties; import javax.mail.*; import javax.mail.internet.*; import javax.activation.*;   properties properties = new properties() session session mimemessage mimemsg   properties.put("mail.smtp.host", "[my host ip]")  session = session.getdefaultinstance(properties) mimemsg = new mimemessage(session)  string recipient = "[to email address]"  mimemsg.addrecipient(message.recipienttype.to, new internetaddress(recipient))  mimemsg.setsubject("this subject") mimemsg.settext("this message #1")  mimemsg.setfrom(new internetaddress("[from email address]"))  bodypart messagebodypart = new mimebodypart() messagebodypart.settext(mimemsg.getcontent())     multipart multipart = new mimemultipart()  string filepath = "[full & correct path test.txt]" datasource source = new filedatasource(filepath) messagebodypart.setdatahandler(new datahandler(source))  string filename = "test.txt" messagebodypart.setfilename("test.txt")  multipart.addbodypart(messagebodypart)  mimemsg.setcontent(multipart)  transport.send(mimemsg)  println "message sent!" 

i think it's classloader issue way groovyconsole runs...

if add following @grab , @grabcconfig script, works...

@grab( 'javax.mail:mail:1.4.7' ) @grabconfig(systemclassloader=true, initcontextclassloader=true) import javax.mail.* import javax.mail.internet.* import javax.activation.*  def props = new properties().with { p ->     p.'mail.smtp.host' = 'my mail server'     p }  def session = session.getdefaultinstance( props )  def message = new mimemessage( session )  message.addrecipient( message.recipienttype.to, new internetaddress( 'to address' ) ) message.subject = 'this subject' message.text = 'this message #1' message.from =  new internetaddress( 'from address' )  def textpart = new mimebodypart() textpart.text = 'this message #2'  def attachment = new mimebodypart() attachment.datahandler = new datahandler( new filedatasource( '/path/to/file.txt' ) ) attachment.filename = 'file.txt'  def multi = new mimemultipart() multi.addbodypart( textpart ) multi.addbodypart( attachment )  message.content = multi  transport.send( message ) 

or, remove 2 @grab , @grabconfig lines, , run command line with:

groovy -cp /path/to/mail-1.4.7.jar:/path/to/activation-1.1.jar mail.groovy