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Asked: 2026-06-09T13:29:41+00:00

I am following this tutorial for sending Emails from My App. When i try

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I am following this tutorial for sending Emails from My App.

When i try to run this in my emulator its getting error as

08-10 08:40:47.839: W/System.err(526): javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465;
08-10 08:40:47.849: W/System.err(526):   nested exception is:
08-10 08:40:47.849: W/System.err(526):  java.net.SocketException: Host is unresolved: smtp.gmail.com
08-10 08:40:47.859: W/System.err(526):  at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1391)
08-10 08:40:47.859: W/System.err(526):  at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412)
08-1 08:40:47.859: W/System.err(526):   at javax.mail.Service.connect(Service.java:310)
08-10 08:40:47.859: W/System.err(526):  at javax.mail.Service.connect(Service.java:169)
08-10 08:40:47.859: W/System.err(526):  at javax.mail.Service.connect(Service.java:118)
08-10 08:40:47.859: W/System.err(526):  at javax.mail.Transport.send0(Transport.java:188)
08-10 08:40:47.859: W/System.err(526):  at javax.mail.Transport.send(Transport.java:118)
08-10 08:40:47.859: W/System.err(526):  at com.mythrii.punchclockpro.Mails.send(Mails.java:107)
08-10 08:40:47.869: W/System.err(526):  at com.mythrii.punchclockpro.login$DownloadImageTask.doInBackground(login.java:277)
08-10 08:40:47.869: W/System.err(526):  at com.mythrii.punchclockpro.login$DownloadImageTask.doInBackground(login.java:1)
08-10 08:40:47.869: W/System.err(526):  at android.os.AsyncTask$2.call(AsyncTask.java:185)
08-10 08:40:47.869: W/System.err(526):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
08-10 08:40:47.869: W/System.err(526):  at java.util.concurrent.FutureTask.run(FutureTask.java:138)
08-10 08:40:47.869: W/System.err(526):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
08-10 08:40:47.869: W/System.err(526):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
08-10 08:40:47.869: W/System.err(526):  at java.lang.Thread.run(Thread.java:1019)
08-10 08:40:47.869: W/System.err(526): Caused by: java.net.SocketException: Host is unresolved: smtp.gmail.com
08-10 08:40:47.869: W/System.err(526):  at java.net.Socket.connect(Socket.java:966)
08-10 08:40:47.880: W/System.err(526):  at java.net.Socket.connect(Socket.java:926)
08-10 08:40:47.880: W/System.err(526):  at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:233)
08-10 08:40:47.880: W/System.err(526):  at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:163)
08-10 08:40:47.880: W/System.err(526):  at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1359)
08-10 08:40:47.880: W/System.err(526):  ... 15 more

I have given all the permissions too.

I am so wonder that the same project running without any errors in my friend system. Is there any external setup for sending mails in my system.

Any suggestions??

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1 Answer

  1. Editorial Team

    try ping smtp.gmail.com and make sure you got a response (able to access). Often times, your connection may block by your firewall or proxy behind.

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