I'm trying to send an email from no-reply@{domain} to my Gmail mailbox. I don't get any errors, just the emails don't arrive in my Gmail.

My PHP code looks like this:

<?php mail('[email protected]', 'Test Email', 'Hello World', 'From: John Doe <no-reply@{domain}>'); ?>

I have set up php.ini like this:

[mail function]
SMTP=mail.{domain}
smtp_port=25
sendmail_from=no-reply@{domain}
mail.add_x_header=Off

In my domain's DNS settings, I have a MX @ 10 mail.{domain} entry. I don't know if this matters, but I already have hMailServer installed. Receiving emails is already available.