Handle SMTP 2xx

app/src/main/java/com/sun/mail/smtp/SMTPTransport.java

@@ -2002,13 +2002,30 @@ public class SMTPTransport extends Transport {
 		break;
 
 	    default:
-		// handle remaining 4xy & 5xy codes
+		// handle remaining 2xy, 4xy & 5xy codes
 		if (retCode >= 400 && retCode <= 499) {
 		    // assume address is valid, although we don't really know
 		    validUnsent.add(ia);
 		} else if (retCode >= 500 && retCode <= 599) {
 		    // assume address is invalid, although we don't really know
 		    invalid.add(ia);
+		} else if (retCode >= 200 && retCode <= 299) {
+		    // see RFC 5321 section 4.3.2
+		    // assume address is valid, although we don't really know
+		    valid.add(ia);
+		    if (!reportSuccess)
+		        break;
+
+		    // user wants exception even when successful, including
+		    // details of the return code
+
+		    // create and chain the exception
+		    sfex = new SMTPAddressSucceededException(ia, cmd, retCode,
+		        lastServerResponse);
+		    if (mex == null)
+		        mex = sfex;
+		    else
+		        mex.setNextException(sfex);
 		} else {
 		    // completely unexpected response, just give up
 		    if (logger.isLoggable(Level.FINE))