Custom domain email

[JC_Pt]

Hello.

I have set up he following webiste in Shopify:

leleh-land.com

The website is already using this domain and not leleh-land.myshopify.com

The domain is hosted by a third-party and is not Google/Zoho.

I need to ensure that customers receiving my emails they will receive them from hello@leleh-land.com

I am lost in the procedures, and can not make this configuration!

Could you please help?

Thanks in advance.

Jorge