How to send email using gmail SMTP server directly from your Android App?

In this page, it shows the steps to create method to send email directly from your Android App without using the mail clients (such as gmail client or outlook App).

This code uses gmail smtp server to send the email.

I hope you like this video. For any questions, suggestions or appreciation please contact us at: https://programmerworld.co/contact/ or email at: programmerworld1990@gmail.com

Complete source code

package com.programmerworld.sendemailapp;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;

import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void buttonSendEmail(View view){

        try {
            String stringSenderEmail = "SenderEmail963@gmail.com";
            String stringReceiverEmail = "receiveremail963@gmail.com";
            String stringPasswordSenderEmail = "Test*123";

            String stringHost = "smtp.gmail.com";

            Properties properties = System.getProperties();

            properties.put("mail.smtp.host", stringHost);
            properties.put("mail.smtp.port", "465");
            properties.put("mail.smtp.ssl.enable", "true");
            properties.put("mail.smtp.auth", "true");

            javax.mail.Session session = Session.getInstance(properties, new Authenticator() {
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(stringSenderEmail, stringPasswordSenderEmail);
                }
            });

            MimeMessage mimeMessage = new MimeMessage(session);
            mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(stringReceiverEmail));

            mimeMessage.setSubject("Subject: Android App email");
            mimeMessage.setText("Hello Programmer, \n\nProgrammer World has sent you this 2nd email. \n\n Cheers!\nProgrammer World");

            Thread thread = new Thread(new Runnable() {
                @Override
                public void run() {
                    try {
                        Transport.send(mimeMessage);
                    } catch (MessagingException e) {
                        e.printStackTrace();
                    }
                }
            });
            thread.start();

        } catch (AddressException e) {
            e.printStackTrace();
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}

plugins {
    id 'com.android.application'
}

android {
    compileSdk 31

    defaultConfig {
        applicationId "com.programmerworld.sendemailapp"
        minSdk 31
        targetSdk 31
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    packagingOptions{
        exclude 'META-INF/NOTICE.md'
        exclude 'META-INF/LICENSE.md'
    }

}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.4.1'
    implementation 'com.google.android.material:material:1.5.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

    implementation 'com.sun.mail:android-mail:1.6.6'
    implementation 'com.sun.mail:android-activation:1.6.7'

}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.programmerworld.sendemailapp">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.SendEmailApp">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="105dp"
        android:layout_marginTop="103dp"
        android:onClick="buttonSendEmail"
        android:text="Send Email"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

senderemail963@gmail.com
to receiveremail963@gmail.com

Hello Programmer,

Programmer World has sent you this 2nd email.

Cheers!
Programmer World