無法使用Java / Play Mailer發送電子郵件

Question

我正在嘗試通過Play Framework Mailer類發送電子郵件，但我一直收到相同的ClassCastException。 這是控制台輸出：

-- Exception in thread "DataHandler.getInputStream" java.lang.ClassCastException: javax.mail.internet.MimeMultipart cannot be cast to java.lang.String
-- at org.apache.geronimo.mail.handlers.TextHandler.writeTo(TextHandler.java:143)
-- at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:889)
-- at javax.activation.DataHandler$1.run(DataHandler.java:266)
-- at java.lang.Thread.run(Thread.java:748)
-- 16:48:06,606 ERROR ~
--
-- @79gebib82
-- The email has not been sent
--
-- Mail error
-- A mail error occurred : Error while sending email
--
-- play.exceptions.MailException: Error while sending email
-- at play.libs.Mail$1.call(Mail.java:193)
-- at play.libs.Mail$1.call(Mail.java:184)
-- at java.util.concurrent.FutureTask.run(FutureTask.java:262)
-- at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1152)
-- at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:622)
-- at java.lang.Thread.run(Thread.java:748)
-- Caused by: org.apache.commons.mail.EmailException: Sending the email to the following server failed : smtp.mailgun.org:465
-- at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1421)
-- at org.apache.commons.mail.Email.send(Email.java:1448)
-- at play.libs.Mail$1.call(Mail.java:190)
-- ... 5 more
-- Caused by: javax.mail.SendFailedException: Send failure (javax.mail.MessagingException: Converting body of type text/html; charset=UTF-8 failed)
-- at javax.mail.Transport.send(Transport.java:163)
-- at javax.mail.Transport.send(Transport.java:48)
-- at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1411)
-- ... 7 more
-- Caused by: javax.mail.MessagingException: Converting body of type text/html; charset=UTF-8 failed
-- at com.google.appengine.api.mail.stdimpl.GMTransport.convertAttachmentToString(GMTransport.java:368)
-- at com.google.appengine.api.mail.stdimpl.GMTransport.sendMessage(GMTransport.java:217)
-- at javax.mail.Transport.send(Transport.java:95)
-- ... 9 more

這是我用來發送電子郵件的代碼：

SimpleEmail email = new SimpleEmail();
email.setFrom("noreply@draftr.app");
email.addTo("signup@draftr.app");
email.setSubject("New Pending User");
email.setMsg("Hey this is a test");
Mail.send(email);

我正在使用Mailgun發送電子郵件，這似乎與該配置無關。 分支了一個現有的，功能正常的活動應用程序並正確發送電子郵件后，我遇到了此錯誤。

因此，ClassCastException沒有多大意義，因為Im使用與現有應用程序相同的體系結構和html表單樣式。 是什么賦予了？

Answer 1

將您的郵件罐更新為1.5.x版本。 該錯誤已在該版本中解決