/**
* Send Email. Use string array to represents attachments file names.
*
* @see #sendEmail(String, String, String[], String[], String[], String, File[])
*/
private static void sendEmail(String smtpHost, MailMessage mail, boolean isAnonymousEmail) {
if (mail == null) {
throw new IllegalArgumentException("Param mail can not be null.");
}
String[] fileNames = mail.getFileNames();
// only needs to check the param: fileNames, other params would be checked through
// the override method.
File[] files = null;
if (fileNames != null && fileNames.length > 0) {
files = new File[fileNames.length];
for (int i = 0; i < files.length; i++) {
File file = new File(fileNames[i]);
files[i] = file;
}
}
sendEmail(
smtpHost,
mail.getSubject(),
mail.getFrom(),
mail.getTos(),
mail.getCcs(),
mail.getBccs(),
mail.getContent(),
files,
isAnonymousEmail);
}
/** * Send anonymous email. Note that although we could give any address as from address, (for * example: <b>'[email protected]' is valid</b>), the from of MailMessage should always be the correct format * of email address(for example the <b>'aaaa' is invalid</b>). Otherwise an exception would be * thrown say that username is invalid. * * @param mail The MailMessage object which contains at least all the required attributes to be * sent. */ public static void sendAnonymousEmail(MailMessage mail) { String dns = "dns://"; Hashtable<String, String> env = new Hashtable<String, String>(); env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.dns.DnsContextFactory"); env.put(Context.PROVIDER_URL, dns); String[] tos = mail.getTos(); try { DirContext ctx = new InitialDirContext(env); for (String to : tos) { String domain = to.substring(to.indexOf('@') + 1); // Get MX(Mail eXchange) records from DNS Attributes attrs = ctx.getAttributes(domain, new String[] {"MX"}); if (attrs == null || attrs.size() <= 0) { throw new java.lang.IllegalStateException( "Error: Your DNS server has no Mail eXchange records!"); } @SuppressWarnings("rawtypes") NamingEnumeration servers = attrs.getAll(); String smtpHost = null; boolean isSend = false; StringBuffer buf = new StringBuffer(); // try all the mail exchange server to send the email. while (servers.hasMore()) { Attribute hosts = (Attribute) servers.next(); for (int i = 0; i < hosts.size(); ++i) { // sample: 20 mx2.qq.com smtpHost = (String) hosts.get(i); // parse the string to get smtpHost. sample: mx2.qq.com smtpHost = smtpHost.substring(smtpHost.lastIndexOf(' ') + 1); try { sendEmail(smtpHost, mail, true); isSend = true; return; } catch (Exception e) { LOGGER.error("", e); buf.append(e.toString()).append("\r\n"); continue; } } } if (!isSend) { throw new java.lang.IllegalStateException("Error: Send email error." + buf.toString()); } } } catch (NamingException e) { LOGGER.error("", e); } }
