Where is your e-mail hosted? In order to redirect e-mail to your mail host, you’ll need to request MX records. These records can be set in your WordPress.com dashboard so that e-mail is rerouted through the correct host.
If you can provide me these records, I can help you set these for you.
I don’t remember. I’ve asked them, and they replied:
Thank you for your email.
That is the instruction for to update the Mx record from their side. However, it seems you cannot update the IP address.
Could you please find out the Ip address of your website, so that we could update it for you.