Custom SMTP in EMail

Custom SMTP in EMail

Hi,

I just switched to Zahoo and have a question related to Email. I could not find information regarding customized SMTP settings. It seems that the page moved  ("Page Not Found" error).  Right now I am using imap.zoho.com & smtp.zoho.com with my custom domain. It works, but I would like to switch to imap.mydomain.com and smtp.mydomain.com. I am not sure if it is possible as I only have a free account and a custom domain hosted at a different provider via Squarespace. Is it possible? What would I need to do? Do I need to make adjustments at the domain server too?

Thanks,

Stefan