This is not an issue. I just want to explain how to use this library on Android

[RahimRahimov]

Add this lines to gradle dependencies and configurations modules.
That is it. So after this steps you can use this library on android.

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'net.sargue:mailgun:1.3.2'
}
configurations {
compile.exclude group: 'javax.inject', module: 'javax.inject'
}

[sargue]

Seems that you are pinning jersey to version 2.18, is that all that you need to do to use it?

[RahimRahimov]

My answer was updated. Android developers need just add configurations "compile.exclude group: 'javax.inject', module: 'javax.inject'" to be able to use your library.

[sargue]

That was discussed in issue #1 . Closing this and updating main README. Thanks for reporting.