Question Mail servers not resolving

[albertax]

Hi fellow Pleskians,

Sorry for the "newbie" question. I'm a part time web designer based here in NZ and i've started hosting my clients websites and mail servers. I have a couple of questions:

1. Name Servers
Plesk has the ability to also act as a Nameserver - but when I point my records at the domain registar to NS1.MYDOMAIN.COM, it does not resolve? Where as if i point it to my Vultr nameserver, it propogates fairly quickly. Any ideas on what could cause this issue?

2. Seperating Mail From Hosting/Server load
How do i seperate mail from hosting? I have a 1GHZ Virtaul CPU, 4GB 50GB Vultr instance that is hosting around 4 websites built with Processwire, all with e-mail accounts. Its sitting at about 5% usage, when should i start thinking about upgrading? How many websites can something of these specs manage?

Any help or assistance would be great.

AT

 

[IgorG]

You can find the answer to your first question in this video:

Plesk Hardware requirements you can find here Hardware Requirements for Plesk Obsidian
In addition, if you want, then you can use mail only hosting if you choose for the domain "No web hosting" hosting type: How to configure domain to use only mail functionality?