Everything depends on how big your list is. If for example, you want to send 10000 emails per hour, the optimum server would have 10 IPs and would be using 10 domains or subdomains. This way each IP/domain would send 1000 emails per hour. The more IPs and domains the better differently applies here.
Minimum system requirements for sending from 1 IP/domain:
- VPS (KVM, OpenVZ, XEN, …)
- CentOS 6 x64 minimal
- 1 core
- 1 GB RAM
- 10 GB HDD
- 1 IP
- 1 domain
I theory a server like this could also be used with more IPs and domains but could get to its peak point.
Here are recommended system requirements based on the number of used IPs/domains
Local PowerMTA
Everything will run on the same server so our server must have enough power. Here are our recommendations:
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Before starting, utilize my MTA Calculator available in the Members area to determine the required number of MTAs or IPs for your intended sending volumes.