java - android sending email from app no longer working -

i used this tutorial send emails inside app. used same code 3 different apps , worked well. now, few months later, stopped working. have searched possible sites, none of them helped me. tried setting lower security gmail account , changing properties session, nothing worked. appreciate help.

            log.d("emailsender","sending message");             properties props = new properties();             props.put("mail.smtp.host", host);             props.put("mail.smtp.socketfactory.port", "465");             props.put("mail.smtp.socketfactory.class",                     "javax.net.ssl.sslsocketfactory");             props.put("mail.smtp.auth", "true");             props.put("mail.smtp.port", "465");             session session = session.getdefaultinstance(props, new javax.mail.authenticator() {                 protected passwordauthentication getpasswordauthentication() {                     return new passwordauthentication(user,pass);                 }             });             try {                 message message = new mimemessage(session);                 message.setfrom(new internetaddress(user));                 message.setrecipients(message.recipienttype.to, internetaddress.parse(sharedpreferenceutils.getuseremail(getactivity())));                 message.setsubject(subject);                 message.setcontent(content, "text/html; charset=utf-8");                  //transport.send(message);                 transport transport = session.gettransport("smtps");                 transport.connect (host, integer.parseint(port), user, pass);                 transport.sendmessage(message, message.getallrecipients());                 transport.close();                 log.d("emailsender", "message sent");             } catch (messagingexception e) {                 e.printstacktrace();                 throw new runtimeexception(e);             } 

my error:

java.net.connectexception: failed connect smtp.gmail.com/2a00:1450:4013:c01::6d (port 465) after 90000ms: isconnected failed: enetunreach (network unreachable)     @ com.sun.mail.smtp.smtptransport.openserver(smtptransport.java:1391)     @ com.sun.mail.smtp.smtptransport.protocolconnect(smtptransport.java:412)     @ javax.mail.service.connect(service.java:288)     @ com.mihaela.myapp.ui.dialog.enterpassworddialog$sendmailtask.doinbackground(enterpassworddialog.java:222)     @ com.mihaela.myapp.ui.dialog.enterpassworddialog$sendmailtask.doinbackground(enterpassworddialog.java:179)     @ android.os.asynctask$2.call(asynctask.java:288)     @ java.util.concurrent.futuretask.run(futuretask.java:237)     @ android.os.asynctask$serialexecutor$1.run(asynctask.java:231)     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587)     @ java.lang.thread.run(thread.java:818)      caused by: java.net.connectexception: failed connect smtp.gmail.com/2a00:1450:4013:c01::6d (port 465) after 90000ms: isconnected failed: enetunreach (network unreachable)     @ libcore.io.iobridge.isconnected(iobridge.java:267)     @ libcore.io.iobridge.connecterrno(iobridge.java:191)     @ libcore.io.iobridge.connect(iobridge.java:127)     @ java.net.plainsocketimpl.connect(plainsocketimpl.java:188)     @ java.net.plainsocketimpl.connect(plainsocketimpl.java:461)     @ java.net.socket.connect(socket.java:918)     @ java.net.socket.connect(socket.java:844)     @ com.sun.mail.util.socketfetcher.createsocket(socketfetcher.java:233)     @ com.sun.mail.util.socketfetcher.getsocket(socketfetcher.java:189)     @ com.sun.mail.smtp.smtptransport.openserver(smtptransport.java:1359)         ... 10 more      caused by: android.system.errnoexception: isconnected failed: enetunreach (network unreachable)     @ libcore.io.iobridge.isconnected(iobridge.java:252)         ... 19 more 

from logs:

java.net.connectexception: failed connect smtp.gmail.com/2a00:1450:4013:c01::6d (port 465) after 90000ms: isconnected failed: enetunreach (network unreachable)

network unreachable. code looks okay, therefore issue must network. please check connectivity. possible causes be:

1. very slow/ bad network. try changing network.
2. internet permission not available in manifest (this shouldn't case described problem). add permission.

for future, can add network-check before sending network requests. thread has answers checking network connectivity: how check internet access on android? inetaddress never times out