Issue in sending email to a group email using java mail -

as subject self explanatory - facing issue in sending email group email using java mail.

i have gone through through several blogs & articles of no & not have precise answer or hangs in middle.

can please help. here mail class you. mail going have link ftp location & text file attachment.

to separate issue tried send simple mail group didn't either.

i tried find answers in places java-forums.org & stack overflow found no luck.

i appreciate quality time & in providing insight issue.

to explain issue better-

my automation framework when completes execution of test cases, sends mail me link execution report & log file attachment. audience report has expanded & need send mail group email address.

when set email (to group.email@company.com) none of users in group receives mail. if send email email address or else email address works.

i no logs or error & not able understand issue correctly.

an insight experts in understanding issue.

thanks in advance. akshat

import java.util.arraylist; import java.util.properties;  import javax.activation.datahandler; import javax.activation.datasource; import javax.activation.filedatasource; import javax.mail.bodypart; import javax.mail.message; import javax.mail.message.recipienttype; import javax.mail.multipart; import javax.mail.session; import javax.mail.transport; import javax.mail.internet.internetaddress; import javax.mail.internet.mimebodypart; import javax.mail.internet.mimemessage; import javax.mail.internet.mimemultipart;   public class reportmail {  private mimemessage message = null; private session emailsession = null; private mimebodypart textpart = null; private arraylist<mimebodypart> attachmentarray = null;  public void sendmailer(string mailtoid, string string, string mailserver1,         int mailport, string mailadmin) {     properties mailproperties = null;     mailproperties = new properties();      string adminemailid = mailadmin;     string mailserver = mailserver1;     mailproperties.put("mail.transport.protocol", "smtp");     //mailproperties.put("mail.smtp.auth", "true");     mailproperties.put("mail.smtp.host", mailserver);     mailproperties.put("mail.from", adminemailid);     mailproperties.put("mail.smtp.port", mailport);     mailproperties.put("mail.to", mailtoid);       try {         emailsession = session.getinstance(mailproperties);         emailsession.setdebug(false);          message = new mimemessage(emailsession);         textpart = new mimebodypart();         attachmentarray = new arraylist<mimebodypart>(2);         message.addrecipients(recipienttype.to, mailtoid);         message.setsubject(string);         message.setfrom(new internetaddress(adminemailid));          setcontent("<a href=\"file://tambe3/report/emailable-report.html\" target=\"_blank\">pcm automation report</a>");         //setcontent("test123");         sendemail();     } catch (exception e) {         e.printstacktrace();     } }  public void setcontent(string content) {     try {         textpart.setcontent(content, "text/html");     } catch (exception e) {         e.printstacktrace();     } }  public boolean sendemail() throws exception {     try {         multipart mp = new mimemultipart();         mp.addbodypart(textpart);         (int = 0; < attachmentarray.size(); i++)             mp.addbodypart(attachmentarray.get(i));          /********************          *           */         // part 2 attachment         bodypart messagebodypart = new mimebodypart();         messagebodypart = new mimebodypart();          messagebodypart.settext("below link test automation report link & attached log file. pfa.");         //mp.addbodypart(messagebodypart);          string filename = "logfile.log";     //c:\workspacepcmsanity\pcmsanity\logfile.log         datasource source = new filedatasource(filename);         messagebodypart.setdatahandler(new datahandler(source));         messagebodypart.setfilename(filename);          mp.addbodypart(messagebodypart);         /**          *           */         message.setcontent(mp);          transport transport = emailsession.gettransport();         transport.connect();         transport.sendmessage(message, message.getrecipients(message.recipienttype.to));         transport.close();     } catch (exception e) {         e.printstacktrace();          throw e;     }     return true; } } 

java doesn't know whether email address single user or group. issue smtp server.