How to send emails with PHP using port 587?

The mail function has to be configured on the back end of your server and your server must have an SMTP mail service, on Linux servers you probably use sendmail , but I'm going to I think the question is not the door but the type of sending.

Two possibilities:

Then how to solve the sending of emails

Simple but not so much, sending via SMTP authenticated by a real email account and preferably by a port with security certificates (if you have it, it is possible), of course it is not 100% guaranteed, but it will work much better certainly compared to sendmail , in the case of PHP to communicate with an SMTP server, be it outlook.com, or gmail, or yahoo, you can use the:

• link

As I explained in this response link

So following this part:

Cadastra e-mail do cliente no campo e-mail, 
Transforma este e-mail em senha, 
Cadastra senha no DB na tabela users, password

Altera status do cliente para "ativo" 
Cadastra data da transação
Cadastra data da aprovação
Cadastra/Altera data do próximo Vencimento

Verifica se o cliente já existe no banco de dados
Envia login e senha para o e-mail do cliente usando a porta 587 do servidor. 
Envia cópia deste e-mail para o administrador do sistema. 

All first 8 items yourself do, that this is very broad and impossible to answer here, so we come to the ones that interest us that are the ones:

**Envia login e senha para o e-mail do cliente** usando a porta 587 do servidor. 
**Envia cópia deste e-mail para o administrador do sistema.** 

Forget the port now, what matters is to send the client and adm, so it should be like this, after all 8 items have been made in phpmailer do this:

$mail = new PHPMailer(true);
try {
    $mail->SMTPDebug = 2;                                 // desative isto depois de efetuar os testes
    $mail->isSMTP();
    $mail->Host = 'smtp.empresax.com';
    $mail->SMTPAuth = true;
    $mail->Username = '[email protected]';
    $mail->Password = 'senha';
    $mail->SMTPSecure = 'ssl';
    $mail->Port = 465;

    //Email que o cliente deve ver como remetente
    $mail->setFrom('[email protected]', 'Mailer');

    //Envia uma cópia oculta para o adm
    $mail->addBCC('[email protected]');

    //Content
    $mail->isHTML(true);
    $mail->Subject = 'Sua senha esta pronta';
    $mail->Body    = 'Conteudo HTML da mensagem';

    $mail->send();
    echo 'Mensagem enviada com sucesso';
} catch (Exception $e) {
    echo 'Message could not be sent.';
    echo 'Mailer Error: ' . $mail->ErrorInfo;
}

Of course this depends on your server settings, and it is likely that your server and anti-SPAM policies will prevent you from sending more than 100 messages per day (each recipient I believe counts as a different message).

Just to note, if it is without TLS and SSL, or it is TLS too, maybe the port is 587, but this is because it is your server / hosting standard, you should check with them, so if it is with TLS, maybe should look like this:

    $mail->SMTPSecure = 'tls';
    $mail->Port = 587;

If it is without TLS and without SSL, then you have to do this:

$mail->SMTPSecure = false;
$mail->SMTPAutoTLS = false;
$mail->Port = 587;

But as I said, look at the documentation for your hosting (usually it has) or consult technical support to know which ports to use, it's usually the same configuration that your client uses in Outlook or Mozilla Thunder Bird.

If it's Gmail or Outlook (old hotmail)

For gmail the configuration should look something like:

    $mail->isSMTP();
    $mail->Host = 'smtp.gmail.com';
    $mail->SMTPAuth = true;
    $mail->Username = '[email protected]';
    $mail->Password = 'senha';
    $mail->SMTPSecure = 'tls';
    $mail->Port = 587;

However, I think it is necessary to enable Gmail to allow the submission, at the following link: link

In outlook I can not remember for sure, maybe it's still smtp.live.com, which would look like:

$mail->Host = 'smtp.office365.com';
$mail->Port       = 587;
$mail->SMTPSecure = 'tls';

Or maybe it's now from office365 (I do not use this, please correct me if you've been wrong about something):

$mail->Host = 'smtp.office365.com';
$mail->Port       = 587;
$mail->SMTPSecure = 'tls';