我需要使用我的playframework应用程序发送电子邮件，但对于测试我想使用Mailtrap而不是真正的smtp服务器。
我使用java / scala下的网站上的邮件配置 - ＆gt;游戏部分：
mail.smtp.host=mailtrap.io
mail.smtp.port=2525
mail.smtp.user=************
mail.smtp.pass=************
mail.smtp.channel="starttls" <-I added this line myself
mail.from = "noreply@myapp.com"<-I added this line myself
当应用程序运行时，我会尝试每隔一分钟发送一封电子邮件来测试邮件程序。
但是在第一次发送时，它会返回错误：
[ERROR] [05/19/2015 09:34:56.397] [application-akka.actor.default-dispatcher-4] [akka://application/user/$d] Sending the email to the following server failed : mailtrap.io:2525
org.apache.commons.mail.EmailException: Sending the email to the following server failed : mailtrap.io:2525
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1410)
at org.apache.commons.mail.Email.send(Email.java:1437)
at email.Mailer$$anonfun$receive$1.applyOrElse(Mailer.scala:35)
at akka.actor.Actor$class.aroundReceive(Actor.scala:465)
at email.Mailer.aroundReceive(Mailer.scala:10)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
at akka.actor.ActorCell.invoke(ActorCell.scala:487)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)
at akka.dispatch.Mailbox.run(Mailbox.scala:220)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: mailtrap.io, port: 2525;
nested exception is:
java.net.NoRouteToHostException: No route to host
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1972)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:642)
at javax.mail.Service.connect(Service.java:317)
at javax.mail.Service.connect(Service.java:176)
at javax.mail.Service.connect(Service.java:125)
at javax.mail.Transport.send0(Transport.java:194)
at javax.mail.Transport.send(Transport.java:124)
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1400)
... 13 more
Caused by: java.net.NoRouteToHostException: No route to host
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:317)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:233)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1938)
... 20 more
[ERROR] [05/19/2015 09:34:57.401] [application-akka.actor.default-dispatcher-4] [akka://application/user/$d] Sending the email to the following server failed : mailtrap.io:2525
org.apache.commons.mail.EmailException: Sending the email to the following server failed : mailtrap.io:2525
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1410)
at org.apache.commons.mail.Email.send(Email.java:1437)
at email.Mailer$$anonfun$receive$1.applyOrElse(Mailer.scala:35)
at akka.actor.Actor$class.aroundReceive(Actor.scala:465)
at email.Mailer.aroundReceive(Mailer.scala:10)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
at akka.actor.ActorCell.invoke(ActorCell.scala:487)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)
at akka.dispatch.Mailbox.run(Mailbox.scala:220)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: mailtrap.io, port: 2525;
nested exception is:
java.net.NoRouteToHostException: No route to host
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1972)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:642)
at javax.mail.Service.connect(Service.java:317)
at javax.mail.Service.connect(Service.java:176)
at javax.mail.Service.connect(Service.java:125)
at javax.mail.Transport.send0(Transport.java:194)
at javax.mail.Transport.send(Transport.java:124)
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1400)
... 13 more
Caused by: java.net.NoRouteToHostException: No route to host
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:317)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:233)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1938)
... 20 more
我很抱歉在你眼前发生了如此大的错误，但是如果有人知道我做错了什么，它可能对我有很大的帮助。
由于