feat(email): initial commit
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# Files
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.classpath
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.externalToolBuilders
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.gradle
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.project
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.pydevproject
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.settings
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.sonar
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*~
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*.ipr
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*.iml
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*.iws
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*.swp
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*.DS_Store
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*.snap.debug
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dependency-reduced-pom.xml
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# Directories
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.idea/
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.run/
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.venv/
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_site/
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build/
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dist/
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docs/_build/
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gen-java/
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gen-javabean/
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gen-py/
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node_modules/
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target/
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# Overview
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This project can serve as starting point for an Email project.
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# Links
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[Sending Email With Java](https://www.baeldung.com/java-email)
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns="http://maven.apache.org/POM/4.0.0"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<name>email</name>
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<description>description</description>
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<url>https://swingbe.de</url>
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<groupId>de.swingbe</groupId>
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<artifactId>email</artifactId>
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<version>0.0.1</version>
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<packaging>jar</packaging>
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<licenses>
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<license>
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<name>GNU General Public License</name>
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<url>https://www.gnu.org/licenses/gpl-3.0.txt</url>
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</license>
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</licenses>
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<scm>
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<url>https://github.com/Software-Ingenieur-Begerad/sandbox-java</url>
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</scm>
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<properties>
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<!-- Other properties -->
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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</properties>
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<dependencies><!-- https://mvnrepository.com/artifact/javax.mail/mail -->
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<dependency>
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<groupId>javax.mail</groupId>
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<artifactId>mail</artifactId>
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<version>1.5.0-b01</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/commons-codec/commons-codec -->
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<dependency>
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<groupId>commons-codec</groupId>
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<artifactId>commons-codec</artifactId>
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<version>1.15</version>
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</dependency>
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<!--required for Logger class-->
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<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-slf4j-impl -->
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<dependency>
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<groupId>org.apache.logging.log4j</groupId>
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<artifactId>log4j-slf4j-impl</artifactId>
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<version>2.17.2</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.10.1</version>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<version>3.2.4</version>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>shade</goal>
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</goals>
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<configuration>
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<filters>
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<filter>
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<!-- exclude signatures from merged JAR to avoid invalid signature messages -->
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<artifact>*:*</artifact>
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<excludes>
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<exclude>META-INF/*.SF</exclude>
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<exclude>META-INF/*.DSA</exclude>
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<exclude>META-INF/*.RSA</exclude>
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</excludes>
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</filter>
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</filters>
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<!-- The shaded JAR will not be the main artifact for the project, it will be attached
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for deployment in the way source and docs are. -->
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<shadedArtifactAttached>true
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</shadedArtifactAttached>
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<shadedClassifierName>shaded</shadedClassifierName>
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<transformers>
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<transformer
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implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
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<transformer
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implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
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<manifestEntries>
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<Main-Class>de.swingbe.email.Main
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</Main-Class>
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</manifestEntries>
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</transformer>
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</transformers>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</project>
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package de.swingbe.email;
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/**
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* Send an email.
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*/
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public interface Email {
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/**
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* Send an email.
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*
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* @param sender sender of the email
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* @param receiver recipient of the email
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* @param subject subject of the email
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* @param content content of the email
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* @param host host used to send email
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* @param user user from which the email is sent
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* @param key key of the user
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*/
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void send(String sender, String receiver, String subject, String content, String user, String key, String host, String contentType);
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}
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package de.swingbe.email;
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/**
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* Factory for creating instance of {@link Email}
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*/
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public class EmailFactory {
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/**
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* Create an instance of {@link Email}
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*
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* @return the created instance
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*/
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public static Email createEmail() {
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return new EmailImpl();
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}
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}
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package de.swingbe.email;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import javax.mail.*;
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import javax.mail.internet.InternetAddress;
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import javax.mail.internet.MimeBodyPart;
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import javax.mail.internet.MimeMessage;
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import javax.mail.internet.MimeMultipart;
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import javax.net.ssl.SSLContext;
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import java.security.KeyManagementException;
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import java.security.NoSuchAlgorithmException;
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import java.util.Arrays;
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import java.util.Properties;
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public class EmailImpl implements Email {
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private final static Logger LOG = LoggerFactory.getLogger(EmailImpl.class);
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@Override
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public void send(String sender, String receiver, String subject, String content, final String user, final String key, String host, String contentType) {
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//TODO Java version 11 and later are working only with TLSv1.2 with this implementation
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SSLContext context = null;
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try {
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context = SSLContext.getInstance("TLS");
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} catch (NoSuchAlgorithmException e) {
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LOG.error("ERROR getting Instance TLS");
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e.printStackTrace();
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}
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try {
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context.init(null, null, null);
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} catch (KeyManagementException e) {
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LOG.error("ERROR initialising context");
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e.printStackTrace();
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}
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String[] supportedProtocols = context.getDefaultSSLParameters().getProtocols();
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LOG.debug("supportedProtocols: " + Arrays.toString(supportedProtocols));
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String sslProtocols = supportedProtocols[supportedProtocols.length - 1];
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LOG.debug("sslProtocols: " + sslProtocols);
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/**
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* configure the library with our email service provider's credentials
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* then, create a Session that is used in constructing a message for sending
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* the configuration is via a Java Properties object
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*/
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Properties prop = new Properties();
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prop.put("mail.smtp.starttls.enable", "true");
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prop.put("mail.smtp.host", host);
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prop.put("mail.smtp.user", user);
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prop.put("mail.smtp.password", key);
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prop.put("mail.smtp.auth", "true");
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prop.put("mail.smtp.port", "587");
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prop.put("mail.smtp.ssl.trust", host);
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prop.put("mail.smtp.ssl.protocols", sslProtocols);
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//create a session with username and key
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Session session = Session.getInstance(prop, new Authenticator() {
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@Override
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protected PasswordAuthentication getPasswordAuthentication() {
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return new PasswordAuthentication(user, key);
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}
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});
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//create a MimeMessage for sending
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Message message = new MimeMessage(session);
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try {
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message.setFrom(new InternetAddress(sender));
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} catch (MessagingException e) {
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LOG.error("ERROR setting From");
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e.printStackTrace();
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}
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try {
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message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(receiver));
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} catch (MessagingException e) {
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LOG.error("ERROR setting Recipient");
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e.printStackTrace();
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}
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try {
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message.setSubject(subject);
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} catch (MessagingException e) {
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LOG.error("ERROR setting Subject");
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e.printStackTrace();
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}
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MimeBodyPart mimeBodyPart = new MimeBodyPart();
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try {
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mimeBodyPart.setContent(content, contentType);
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} catch (MessagingException e) {
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LOG.error("ERROR setting Content");
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e.printStackTrace();
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}
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Multipart multipart = new MimeMultipart();
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try {
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multipart.addBodyPart(mimeBodyPart);
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} catch (MessagingException e) {
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LOG.error("ERROR adding Body");
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e.printStackTrace();
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}
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try {
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message.setContent(multipart);
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} catch (MessagingException e) {
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LOG.error("ERROR setting Content");
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e.printStackTrace();
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}
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try {
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Transport.send(message);
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} catch (MessagingException e) {
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LOG.error("ERROR sending message");
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e.printStackTrace();
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}
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}
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}
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package de.swingbe.email;
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import org.apache.commons.codec.binary.Base64;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import javax.mail.*;
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import javax.mail.internet.InternetAddress;
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import javax.mail.internet.MimeBodyPart;
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import javax.mail.internet.MimeMessage;
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import javax.mail.internet.MimeMultipart;
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import javax.net.ssl.SSLContext;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileReader;
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import java.io.IOException;
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import java.security.KeyManagementException;
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import java.security.NoSuchAlgorithmException;
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import java.util.Arrays;
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import java.util.Properties;
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public class Main {
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private final static Logger LOG = LoggerFactory.getLogger(Main.class);
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/**
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* The mail host from which the emails are sent.
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*/
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private final static String mailHost = "mail.vbn.de";
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/**
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* The mail user from which the emails are sent.
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*/
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private final static String mailUser = "Tarifmatrix";
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/**
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* The mail address from which the emails are sent.
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*/
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private final static String mailSender = "no_reply_tm@vbn.de";
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private final static String mailReceiver = "sbegerad@posteo.de";
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/**
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* The mail user password from which the emails are sent.
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*/
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private static final String password;
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static {
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//TODO make parameter accessible using configuration
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// password = new String(Base64.decodeBase64((new BufferedReader(new FileReader("." + File.separator + "credentials" + File.separator + "email.txt"))).readLine().getBytes()));
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password = new String(Base64.decodeBase64("cHRlVjlsVTdrekoyZEYwMTlKNDM="));
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}
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public static void main(String[] args) {
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LOG.debug("Hello world!");
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EmailFactory.createEmail().send(mailSender, mailReceiver, "Subject", "This is my first email using JavaMailer", mailUser, password, mailHost, "text/html; charset=utf-8");
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LOG.debug("Bye!");
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return;
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}
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}
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<?xml version="1.0" encoding="UTF-8"?>
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<Configuration status="INFO">
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<Appenders>
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# Rolling appender
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<RollingFile name="rollingFile"
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fileName="log.txt"
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filePattern="log-%d{yyyy-MM-dd}-%i.txt.gz"
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ignoreExceptions="false">
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<PatternLayout>
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<Pattern>[%-5p] %d{yyyy-MM-dd HH:mm:ss.SSS} %c{1} %m%n
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</Pattern>
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</PatternLayout>
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<Policies>
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<SizeBasedTriggeringPolicy size="21MB"/>
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</Policies>
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<DefaultRolloverStrategy max="50"/>
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</RollingFile>
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# Console appender
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<Console name="console" target="SYSTEM_OUT">
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# Pattern of log message for console appender
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<PatternLayout pattern="[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} %c{1} - %msg%n"/>
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</Console>
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</Appenders>
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<Loggers>
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# Override log level for specified package
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<Logger name="de.swingbe" level="all">
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<appender-ref ref="rollingFile" level="all"/>
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</Logger>
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<Root level="all" additivity="false">
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<appender-ref ref="console"/>
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</Root>
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</Loggers>
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</Configuration>
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