#48 programmatic support for trusting hosts

src/main/java/org/simplejavamail/mailer/Mailer.java

@@ -250,7 +250,7 @@ public Session getSession() {
 	}
 
 	/**
-	 * Actually sets {@link Session#setDebug(boolean)} so that it generates debug information. To get more information out of the underlying JavaMail
+	 * Calls {@link Session#setDebug(boolean)} so that it generates debug information. To get more information out of the underlying JavaMail
 	 * framework or out of Simple Java Mail, increase logging config of your chosen logging framework (examples <a
 	 * href="http://www.simplejavamail.org/#/proxy">here</a>).
 	 *
@@ -261,6 +261,25 @@ public void setDebug(final boolean debug) {
 		mailSender.setDebug(debug);
 	}
 
+	/**
+	 * Configures the current session to trust all hosts and don't validate any SSL keys. The property "mail.smtp.ssl.trust" is set to "*".
+	 * <p>
+	 * Refer to https://javamail.java.net/nonav/docs/api/com/sun/mail/smtp/package-summary.html#mail.smtp.ssl.trust
+	 */
+	public void trustAllSSLHosts(boolean trustAllHosts) {
+		mailSender.trustAllHosts(trustAllHosts);
+	}
+
+	/**
+	 * Configures the current session to white list all provided hosts and don't validate SSL keys for them. The property "mail.smtp.ssl.trust" is set
+	 * to a comma separated list.
+	 * <p>
+	 * Refer to https://javamail.java.net/nonav/docs/api/com/sun/mail/smtp/package-summary.html#mail.smtp.ssl.trust
+	 */
+	public void trustSSLHosts(String... hosts) {
+		mailSender.trustHosts(hosts);
+	}
+
 	/**
 	 * Copies all property entries into the {@link Session} using {@link Session#getProperties()}.
 	 *

src/main/java/org/simplejavamail/mailer/internal/mailsender/MailSender.java

@@ -246,6 +246,35 @@ public void setDebug(final boolean debug) {
 		session.setDebug(debug);
 	}
 
+	/**
+	 * Configures the current session to trust all hosts and don't validate any SSL keys. The property "mail.smtp.ssl.trust" is set to "*".
+	 * <p>
+	 * Refer to https://javamail.java.net/nonav/docs/api/com/sun/mail/smtp/package-summary.html#mail.smtp.ssl.trust
+	 */
+	public void trustAllHosts(boolean trustAllHosts) {
+		session.getProperties().remove("mail.smtp.ssl.trust");
+		if (trustAllHosts) {
+			session.getProperties().setProperty("mail.smtp.ssl.trust", "*");
+		}
+	}
+
+	/**
+	 * Configures the current session to white list all provided hosts and don't validate SSL keys for them. The property "mail.smtp.ssl.trust" is set
+	 * to a comma separated list.
+	 * <p>
+	 * Refer to https://javamail.java.net/nonav/docs/api/com/sun/mail/smtp/package-summary.html#mail.smtp.ssl.trust
+	 */
+	public void trustHosts(String... hosts) {
+		trustAllHosts(false);
+		if (hosts.length > 0) {
+			StringBuilder builder = new StringBuilder(hosts[0]);
+			for (int i = 1; i < hosts.length; i++) {
+				builder.append(",").append(hosts[i]);
+			}
+			session.getProperties().setProperty("mail.smtp.ssl.trust", builder.toString());
+		}
+	}
+
 	/**
 	 * @param properties Properties which will be added to the current {@link Session} instance.
 	 */
@@ -267,4 +296,5 @@ public Session getSession() {
 	public synchronized void setThreadPoolSize(int threadPoolSize) {
 		this.threadPoolSize = threadPoolSize;
 	}
+
 }

src/test/java/org/simplejavamail/mailer/internal/mailsender/MailSenderTest.java

@@ -0,0 +1,50 @@
+package org.simplejavamail.mailer.internal.mailsender;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import javax.mail.Session;
+import java.util.Properties;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class MailSenderTest {
+
+	private Session session;
+	private MailSender mailSender;
+
+	@Before
+	public void setup() {
+		session = Session.getDefaultInstance(new Properties());
+		mailSender = new MailSender(session, null, null);
+	}
+
+	@Test
+	public void setDebug() {
+		mailSender.setDebug(true);
+		assertThat(session.getDebug()).isTrue();
+		mailSender.setDebug(false);
+		assertThat(session.getDebug()).isFalse();
+	}
+
+	@Test
+	public void trustAllHosts() {
+		mailSender.trustAllHosts(true);
+		assertThat(session.getProperties().getProperty("mail.smtp.ssl.trust")).isEqualTo("*");
+		mailSender.trustAllHosts(false);
+		assertThat(session.getProperties().getProperty("mail.smtp.ssl.trust")).isNull();
+	}
+
+	@Test
+	public void trustHosts(){
+		mailSender.trustHosts();
+		assertThat(session.getProperties().getProperty("mail.smtp.ssl.trust")).isNull();
+		mailSender.trustHosts("a");
+		assertThat(session.getProperties().getProperty("mail.smtp.ssl.trust")).isEqualTo("a");
+		mailSender.trustHosts("a", "b");
+		assertThat(session.getProperties().getProperty("mail.smtp.ssl.trust")).isEqualTo("a,b");
+		mailSender.trustHosts("a", "b", "c");
+		assertThat(session.getProperties().getProperty("mail.smtp.ssl.trust")).isEqualTo("a,b,c");
+	}
+
+}