Java Mail Api throws MessagingException: Exception reading response

Question

I'm trying to send a mail using localhost and Java Mail Api, however when sending the mail an exception is generated

Exception in thread "main" java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:47)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:86)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
Caused by: javax.mail.MessagingException: Exception reading response;
  nested exception is:
    java.net.SocketTimeoutException: Read timed out
    at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:2202)
    at com.sun.mail.smtp.SMTPTransport.close(SMTPTransport.java:1212)
    at javax.mail.Transport.send0(Transport.java:257)
    at javax.mail.Transport.send(Transport.java:124)
    at com.monoplus.mcd.JavaMailApi.sendMail(JavaMailApi.java:87)
    at com.monoplus.mcd.SendMailMain.main(SendMailMain.java:18)
    ... 8 more
Caused by: java.net.SocketTimeoutException: Read timed out
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
    at java.net.SocketInputStream.read(SocketInputStream.java:171)
    at java.net.SocketInputStream.read(SocketInputStream.java:141)
    at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:124)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
    at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:89)
    at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:2182)
    ... 13 more

My Postfix is running and its configuration is the default.

Also, port 25 is in listening status

And I'm able to connect using telnet localhost 25

Source code is at https://bitbucket.org/saavedrah_/javamail/src/master/

Thank you

Answer 1

In my build.gradle I had a reference to these two libraries

    implementation 'javax.mail:javax.mail-api:1.6.2'
    implementation 'javax.mail:mail:1.5.0-b01'

when removing the javax.mail-api reference the mail was sent without any problem.

Thank you