Perhaps wherever they are, as long as you control your DNS records. I launched many sites on which the web server is located in our building, and the mail server is located on the clientβs own site, connected using an unrelated provider. In one case, the web server is in the United States, and the mail server is in the UK.
DNS records may again be on another server. Some registrars include editing DNS records in their interface, while others simply allow you to configure DNS on another server.
The entries that define the email server are called MX records. They take the name of the mail server (and not its IP address). Entries that turn names into IP addresses are called entries β you use them for βwww,β etc.
rjmunro
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