java - javax.mail.AuthenticationFailedException: 535 authentication failed (#5.7.1) -

i making auto send email java project using javamail api. when send mail using smtp.gmail.com host, works. when use own host server mail.sitename.com...it shows exception..my username , password right. please me sort out problem... exception is:-

    javax.mail.authenticationfailedexception: 535 authentication failed (#5.7.1)      @ com.sun.mail.smtp.smtptransport$authenticator.authenticate(smtptransport.java:826)     @ com.sun.mail.smtp.smtptransport.authenticate(smtptransport.java:761)     @ com.sun.mail.smtp.smtptransport.protocolconnect(smtptransport.java:685)     @ javax.mail.service.connect(service.java:317)     @ javax.mail.service.connect(service.java:176)     @ javax.mail.service.connect(service.java:125)     @ javax.mail.transport.send0(transport.java:194)     @ javax.mail.transport.send(transport.java:124)     @ com.zenga.servlet.mailnotification.sendmail(mailnotification.java:130)     @ com.zenga.servlet.mailnotification.dopost(mailnotification.java:45)     @ javax.servlet.http.httpservlet.service(httpservlet.java:641)     @ javax.servlet.http.httpservlet.service(httpservlet.java:722)     @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:305)     @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:210)     @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:224)     @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:169)     @ org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:472)     @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:168)     @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:98)     @ org.apache.catalina.valves.accesslogvalve.invoke(accesslogvalve.java:928)     @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:118)     @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:407)     @ org.apache.coyote.http11.abstracthttp11processor.process(abstracthttp11processor.java:987)     @ org.apache.coyote.abstractprotocol$abstractconnectionhandler.process(abstractprotocol.java:539)     @ org.apache.tomcat.util.net.jioendpoint$socketprocessor.run(jioendpoint.java:300)     @ java.util.concurrent.threadpoolexecutor.runworker(unknown source)     @ java.util.concurrent.threadpoolexecutor$worker.run(unknown source)     @ java.lang.thread.run(unknown source) 

codes:---

a) using dao pattern data fetching to(email id ) purpose b) jsp file take start , limit fetch no of connection gonna send emails.. c) servlet file given below...

package com.zenga.servlet;  import java.io.*; import java.security.generalsecurityexception; import java.util.*; import com.sun.mail.util.mailsslsocketfactory; import com.zenga.dao.daofactory; import javax.servlet.servletexception; import javax.servlet.annotation.webservlet; import javax.servlet.http.httpservlet; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse; import javax.mail.*; import javax.mail.internet.*;  /**  * servlet implementation class send  */ @webservlet("/send") public class mailnotification extends httpservlet {     private static final long serialversionuid = 1l;      @suppresswarnings("unchecked")     protected void dopost(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {         // todo auto-generated method stub          hashmap<string, string>list =   new hashmap<string, string>();         set<?> set      =   null;         iterator<?> itr =   null;         int start   =   0;         int limit   =   0;         map.entry<string, string> me = null;         try {             daofactory dao  =   daofactory.getdao();             start   =   integer.parseint(request.getparameter("start"));             limit   =   integer.parseint(request.getparameter("end"));             list    =   dao.insertlimit(start,limit);             set     =   list.entryset();             itr     =   set.iterator();              while(itr.hasnext()) {                 me  =   (map.entry<string, string>)itr.next();                 sendmail(me.getkey(),me.getvalue(),request,response);             }         } catch (exception e) {          }      }      private void sendmail(string tousername, string to,httpservletrequest request,httpservletresponse response) throws ioexception, generalsecurityexception {         final string        =   "xyz@sitename.com";        final string subject     =   "a subject";        final string password    =   "password";        final string host        =   "mail.sitename.com";          string msg         =    getmessage(tousername);              //set host smtp address                    /*mailsslsocketfactory socketfactory= new mailsslsocketfactory();             socketfactory.settrustallhosts(true);              properties properties=system.getproperties();             properties.put("mail.smtp.host", host);             properties.put("mail.smtp.user", from);             properties.put("mail.smtp.password", password);             //properties.put("mail.smtp.starttls.enable","true");             properties.put("mail.smtp.ssl.socketfactory", socketfactory);              properties.put("mail.smtp.enablessl.enable","true");           //  properties.put("mail.smtp.ssl.enable","false");             properties.put("mail.smtp.ssl.trust",host);             properties.put("mail.protocol.ssl.trust", host);             properties.put("mail.smtp.socketfactory.port", "587");                     properties.put("mail.smtp.socketfactory.class",                     "javax.net.ssl.sslsocketfactory");             properties.put("mail.smtp.port", "587");             properties.put("mail.smtp.auth", "true");             */               properties properties=system.getproperties();             properties.put("mail.smtp.host",host);             properties.put("mail.smtp.user",from);             properties.put("mail.smtp.password",password);             properties.put("mail.smtp.port","587");             properties.put("mail.smtp.auth","true");         //  properties.put("mail.smtp.starttls.enable","true");                 properties.put("mail.smtp.ssl.enable","false");                 properties.put("mail.smtp.starttls.enable","false");              authenticator auth = new authenticator(){                 public passwordauthentication getpasswordauthentication() {                     return new passwordauthentication(from,password);                 }             };             session session=session.getdefaultinstance(properties,auth);             response.setcontenttype("text/html");             try{                 // create message                  mimemessage message=new mimemessage(session);                  // set , address               //  internetaddress addressfrom = new internetaddress(from);                 message.setfrom(new internetaddress(from));                 //internetaddress addressto   = new internetaddress(to);                 message.addrecipient(message.recipienttype.to,new internetaddress(to));                  // setting subject , content type                 message.setsubject(subject);                  // create , fill first message part                 mimebodypart msgbodypart = new mimebodypart();                  msgbodypart.settext(msg,"ascii","hmtl");                   // create multipart , add parts                 multipart multipart=new mimemultipart();                 multipart.addbodypart(msgbodypart);                 // add multipart message                 message.setcontent(multipart);                 // set date: header                 message.setsentdate(new date());                          transport.send(message);                         success++;               }             catch(messagingexception me)             {                  failed++;                 me.printstacktrace();             }      }        /**      * @see httpservlet#dopost(httpservletrequest request, httpservletresponse response)      */ } 

i have tried in comment nothing worked. read many stackoverflow examples , no 1 solving correctly.

got solution.... javax.mail.authenticationfailedexception: 535 authentication failed (#5.7.1) occurs when host not authenticate user upto limit using code...as called host send mail approax 500 users @ 1 program running.so sendmail() called 500 times , got server hanged. hence blocked authentication coding site yet can access using browser. figured out solution when created new account , in coding made thread sendmail() called on 10 sec interval , send 100 users in go. host network solutions email login. hope if can give solution sort of problem. :)