Javamail, Transport.send() very slow
bulk, jakarta-mail, java, mass-emails
Solution
Ok, thank you for your suggestions.
My solution is:
Transport transport = session.getTransport("smtp");
transport.connect(this._properties.getProperty("mail.smtp.host"),
Integer.parseInt(this._properties.getProperty("mail.smtp.port")),
this._properties.getProperty("mail.smtp.user"),
this._properties.getProperty("mail.smtp.password"));
Address[] addr = new Address[this._addresses.size()];
for (int i = 0, c = this._addresses.size(); i < c; i++)
{
addr[i] = new InternetAddress(this._addresses.get(i));
}
transport.sendMessage(message, addr);
Problem
I have written a method for sending emails in bulk but it is very very slow (around 3 mails every 10 seconds). I want to send thousands of mails. Is there any way to do this much more faster? I am using gmail now but only for test, finally I want to send using my own SMTP server. Here is the code: ``` public boolean sendMessages() { try { Session session = Session.getInstance(this._properties, new javax.mail.Authenticator() { @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication("user", "password"); } }); MimeMessage message = new MimeMessage(session); message.setFrom(new InternetAddress(this.getFrom())); message.setSubject(this.getSubject()); message.setText(this.getBody()); for (int i = 0, c = this._addresses.size(); i < c; i++) { message.setRecipient(Message.RecipientType.TO, new InternetAddress(this._addresses.get(i))); Transport.send(message); } return true; } catch(AuthenticationFailedException e) { e.printStackTrace(); return false; } catch(MessagingException e) { e.printStackTrace(); return false; } } ```