spring - How can attachment names be retrieved from a JavaMailSender exception? -

i'm using org.springframework.mail.javamail.javamailsender (spring framework 4.1.6). i'm sending multiple emails calling:

mailsender.send(mimemessagepreparators); 

where mimemessagepreparators mimemessagepreparator array. each mimemessagepreparator built follows:

        mimemessagepreparator mimemessagepreparator = new mimemessagepreparator() {             public void prepare(mimemessage mimemessage) throws messagingexception {                  mimemessagehelper mimemessagehelper = new mimemessagehelper(mimemessage, true);                  // subscribers of attachment , put them recipients                 // of email                 mimemessagehelper.setto(subscribers);                  // email have same from, bcc, reply to, subject, , body                 string fromemailaddress = emailtemplate.getfromemailaddress();                 mimemessagehelper.setfrom(fromemailaddress);                  // note: bcc sender email                 mimemessagehelper.setbcc(fromemailaddress);                  // on auto replies , bounce messages                 // should on deliverability                 mimemessagehelper.setreplyto(fromemailaddress);                  string subject = emailtemplate.getsubject();                 mimemessagehelper.setsubject(subject);                  string emailbody = emailtemplate.getbody();                 mimemessagehelper.settext(open_email_tags + emailbody + close_email_tags, true);                  // physical file , add email attachment                 filesystemresource file = new filesystemresource(new file(directory, attachment.getname()));                 mimemessagehelper.addattachment(attachment.getname(), file);              }         }; 

i need know emails failed (i.e. had mailexception) , tell user names of attachments associated emails failed. how can retrieve attachment names exception? far, have

try {         mailsender.send(mimemessagepreparators); } catch (mailsendexception mailsendexception) {          map<object, exception> map = mailsendexception.getfailedmessages();          (map.entry<object, exception> entry : map.entryset()) {             mimemessage mimemessage = (mimemessage) entry.getkey();             // attachment names mimemessage? or preferably             // in more simplistic way using helper such mimemessagehelper } catch (mailexception mailexception) {     // how attachment names here? } 

if have bunch of mimemessage objects, see javamail faq entries starting here:

• how tell if message has attachments?

essentially, need iterate on parts in message, determine ones represent attachments, , access whatever metadata or headers in part think represent attachment "name".