With Hosting Controller you cannot specify more than 2 nameservers. If you use DNS software such as Simple DNS Plus, you can set it to do an automatically do a Zone Transfer to additional servers. Even though you cannot enter these additional servers into HC, they will still work for your hosted sites just the same and automated. I set HC to only create zones on the primary DNS server and that server does a zone transfer to 4 others. I can then just tell my customers to use NS1 ? NS5 in the account information e-mail.
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