I've recently moved my website to a new server.
I've changed the DNS record to use the new server for the website but, I'm still using the old one as a mail server. So, basically, the DNS is set up to the new server for the normal web traffic and to the old one for email (MX on the DNS).
Now, I have a contact form on Wordpress that should be able to use one of my email address.
I've set up the email address to work as SMTP on my server but it seems not working.
I've not added records for that on the DNS; I've just the record that directs the mail traffic to the old server. Do I need and, in case, which records should I've to add?