skip email address validation by default, can be turned on

src/main/java/org/codemonkey/simplejavamail/EmailAddressValidationCriteria.java

@@ -8,9 +8,17 @@
  * @see #EmailAddressValidationCriteria(boolean, boolean)
  */
 public class EmailAddressValidationCriteria {
+
 	private final boolean allowDomainLiterals;
 	private final boolean allowQuotedIdentifiers;
 
+	/**
+	 * Criteria which is most RFC 2822 compliant and allows all compiant address forms, including the more exotic ones.
+	 * 
+	 * @see #EmailAddressValidationCriteria(boolean, boolean)
+	 */
+	public static final EmailAddressValidationCriteria RFC_COMPLIANT = new EmailAddressValidationCriteria(true, true);
+
 	/**
 	 * @param allowDomainLiterals <ul>
 	 *            <li>This flag states whether domain literals are allowed in the email address, e.g.:
@@ -25,8 +33,7 @@ public class EmailAddressValidationCriteria {
 	 *            change this constant to <tt>false</tt>.
 	 *            <p>
 	 *            Its default value is <tt>true</tt> to remain RFC 2822 compliant, but you should set it depending on what you need for your
-	 *            application.
-	 *            </li>
+	 *            application.</li>
 	 *            </ul>
 	 * @param allowQuotedIdentifiers <ul>
 	 *            <li>This flag states whether quoted identifiers are allowed (using quotes and angle brackets around the raw address) are
@@ -39,8 +46,7 @@ public class EmailAddressValidationCriteria {
 	 *            <tt>false</tt>.
 	 *            <p>
 	 *            Its default value is <tt>true</tt> to remain RFC 2822 compliant, but you should set it depending on what you need for your
-	 *            application.
-	 *            </li>
+	 *            application.</li>
 	 *            </ul>
 	 */
 	public EmailAddressValidationCriteria(boolean allowDomainLiterals, boolean allowQuotedIdentifiers) {

src/main/java/org/codemonkey/simplejavamail/EmailValidationUtil.java

@@ -37,10 +37,10 @@ private EmailValidationUtil() {
 	 * 
 	 * @param email A complete email address.
 	 * @return Whether the e-mail address is compliant with RFC 2822.
-	 * @see EmailAddressValidationCriteria#EmailAddressValidationCriteria(boolean, boolean)
+	 * @see EmailAddressValidationCriteria#RFC_COMPLIANT
 	 */
 	public static boolean isValid(final String email) {
-		return isValid(email, new EmailAddressValidationCriteria(true, true));
+		return isValid(email, EmailAddressValidationCriteria.RFC_COMPLIANT);
 	}
 
 	/**
@@ -49,7 +49,7 @@ public static boolean isValid(final String email) {
 	 * @param email A complete email address.
 	 * @param emailAddressValidationCriteria A set of flags that restrict or relax RFC 2822 compliance.
 	 * @return Whether the e-mail address is compliant with RFC 2822, configured using the passed in {@link EmailAddressValidationCriteria}.
-	 * @see EmailAddressValidationCriteria#EmailAddressValidationCriteria(boolean, boolean)
+	 * @see EmailAddressValidationCriteria#RFC_COMPLIANT
 	 */
 	public static boolean isValid(final String email, final EmailAddressValidationCriteria emailAddressValidationCriteria) {
 		return buildValidEmailPattern(emailAddressValidationCriteria).matcher(email).matches();

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

@@ -69,7 +69,7 @@
 public class Mailer {
 
 	private static final Logger logger = LoggerFactory.getLogger(Mailer.class);
-	
+
 	/**
 	 * Encoding used for setting body text, email address, headers, reply-to fields etc. ({@value #CHARACTER_ENCODING}).
 	 */
@@ -101,22 +101,22 @@ public class Mailer {
 	 * Default constructor, stores the given mail session for later use. Assumes that *all* properties used to make a connection are
 	 * configured (host, port, authentication and transport protocol settings).
 	 * <p>
-	 * Also defines a default email address validation criteria object, which remains true to RFC 2822, meaning allowing both domain
-	 * literals and quoted identifiers (see {@link EmailAddressValidationCriteria#EmailAddressValidationCriteria(boolean, boolean)}).
+	 * Also leaves email address validation criteria empty so that no validation is being performed. Validation errors will come from the
+	 * smtp server instead.
 	 * 
 	 * @param session A preconfigured mail {@link Session} object with which a {@link Message} can be produced.
 	 */
 	public Mailer(final Session session) {
 		this.session = session;
-		this.emailAddressValidationCriteria = new EmailAddressValidationCriteria(true, true);
+		this.emailAddressValidationCriteria = null;
 	}
 
 	/**
 	 * Overloaded constructor which produces a new {@link Session} on the fly. Use this if you don't have a mail session configured in your
 	 * web container, or Spring context etc.
 	 * <p>
-	 * Also defines a default email address validation criteria object, which remains true to RFC 2822, meaning allowing both domain
-	 * literals and quoted identifiers (see {@link EmailAddressValidationCriteria#EmailAddressValidationCriteria(boolean, boolean)}).
+	 * Also leaves email address validation criteria empty so that no validation is being performed. Validation errors will come from the
+	 * smtp server instead.
 	 * 
 	 * @param host The address URL of the SMTP server to be used.
 	 * @param port The port of the SMTP server.
@@ -134,7 +134,7 @@ public Mailer(final String host, final Integer port, final String username, fina
 		}
 		this.transportStrategy = transportStrategy;
 		this.session = createMailSession(host, port, username, password);
-		this.emailAddressValidationCriteria = new EmailAddressValidationCriteria(true, true);
+		this.emailAddressValidationCriteria = null;
 	}
 
 	/**
@@ -287,7 +287,7 @@ public boolean validate(final Email email)
 			throw new MailException(MailException.MISSING_RECIPIENT);
 		} else if (email.getFromRecipient() == null) {
 			throw new MailException(MailException.MISSING_SENDER);
-		} else {
+		} else if (emailAddressValidationCriteria != null) {
 			if (!EmailValidationUtil.isValid(email.getFromRecipient().getAddress(), emailAddressValidationCriteria)) {
 				throw new MailException(String.format(MailException.INVALID_SENDER, email));
 			}
@@ -362,7 +362,8 @@ private void setReplyTo(final Email email, final Message message)
 			throws UnsupportedEncodingException, MessagingException {
 		final Recipient replyToRecipient = email.getReplyToRecipient();
 		if (replyToRecipient != null) {
-			InternetAddress replyToAddress = new InternetAddress(replyToRecipient.getAddress(), replyToRecipient.getName(), CHARACTER_ENCODING);
+			InternetAddress replyToAddress = new InternetAddress(replyToRecipient.getAddress(), replyToRecipient.getName(),
+					CHARACTER_ENCODING);
 			message.setReplyTo(new Address[] { replyToAddress });
 		}
 	}
@@ -516,7 +517,7 @@ private class MimeEmailMessageWrapper {
 
 	/**
 	 * Overrides the default email address validation restrictions when validating and sending emails using the current <code>Mailer</code>
-	 * instance.
+	 * instance. By default no validation will be performed by simple-java-mail, until a criteria object has been set.
 	 * 
 	 * @param emailAddressValidationCriteria Refer to
 	 *            {@link EmailAddressValidationCriteria#EmailAddressValidationCriteria(boolean, boolean)}.