Support for TLS 1.2 SMTP

[radabo]

Version: 2.4

Bug Description

If SMTP server support only TLS 1.2 isn't possible connect it.

Expected Behavior

In SmtpMailer is now this:
stream_socket_enable_crypto($this->connection, true, STREAM_CRYPTO_METHOD_TLS_CLIENT)

i found solution on php.net

$cryptoMethod = STREAM_CRYPTO_METHOD_TLS_CLIENT;

if (defined('STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT')) {
$cryptoMethod |= STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT;
$cryptoMethod |= STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT;
}

if (!stream_socket_enable_crypto($this->connection, true, $cryptoMethod)) {
throw new SmtpException('Unable to connect via TLS.');
}

What do you think?

[dg]

Looks good. Did you test it?

[radabo]

I tried:

PHP version 7.1
TLS 1.2 - OK
TLS 1.1 - OK
TLS 1.0 - OK

[dg]

Thanks