Why choose a private email server for your business
A private email server is a mail server that serves one organisation and nobody else. Your mail leaves from an address only your domains use, so its reputation rests on your own sending. No other customer's mailbox, spam run or busy website shares the machine, and the server is sized for your mail. Noiz runs this as Private Email: a mail server of your own, managed by us and quoted for each organisation. Email on a shared hosting plan suits everyday mail; a private server is for an organisation whose mail has become too important, too large or too busy to share.
Email on hosting, and when it is not enough
Every Noiz shared hosting plan includes email for your own domains, managed in the same control panel as your website. For a business with light, everyday mail, that is all it needs. Nobody has to move.
Mail on a shared plan does share things, though. It shares the plan's disk with the website, the server with other customers' sites and mail, and the addresses that mail is sent from. As an organisation grows, those shared parts start to matter.
What a server of your own changes
Your own sending reputation. Receiving mail services judge every message partly by the address it was sent from. Google's sender guidelines say plainly that on a shared sending address, every sender's activity affects the reputation of all the others. On a private server, your mail leaves from an address only your domains use, so its reputation is yours to keep.
Isolation. No other organisation is on the server. Another customer's compromised mailbox, spam run or traffic spike cannot reach your mail.
Mail apart from websites. Your mail runs apart from the web hosting platform, so a busy website, a broken plugin or maintenance on the web servers does not touch it.
Sized for you. The server is quoted and sized for your organisation's mail instead of inherited from a hosting plan.
What Private Email includes
Private Email is built on open-source software and standard mail protocols, so any ordinary mail app can connect to it. It includes:
- webmail
- IMAP and SMTP for any standard mail app, including Thunderbird
- a spam filter that learns from your mail, virus scanning, and a quarantine so nothing suspect is lost
- two-factor authentication for your users
- DKIM signing, with SPF and DMARC set up for your domains
- sync jobs that bring mail across from your old server
Security around the server
- Two-factor authentication means a stolen password alone does not open a mailbox.
- Filtering and quarantine catch spam and viruses before they reach a mailbox, and keep what they catch where you can review it.
- SPF, DKIM and DMARC are set up for your domains, so receiving servers can check that your mail is really yours.
POPIA and your mail
Your mailboxes are full of personal information about your staff, clients and suppliers. The Protection of Personal Information Act (POPIA) places the duty to protect it on the responsible party: the business that decides why and how that information is processed.
- Section 19 requires the responsible party to secure personal information with appropriate, reasonable technical and organisational measures, to identify foreseeable risks, and to keep its safeguards up to date.
- Sections 20 and 21 cover an operator, someone who processes personal information for you under a contract, such as a company that runs your mail server. The operator must treat the information as confidential, and you must have a written contract requiring it to keep the security measures in place.
- Section 72 limits sending personal information to a third party in another country unless one of a set of conditions is met, such as an adequate level of protection there.
A private server does not make a business compliant on its own; that depends on how the whole organisation handles information. It does make the answers to POPIA's questions simpler: the mail is on one server, for one organisation, run by a company you have a contract with.
Who runs what
On Private Email, Noiz runs the server:
- the server and its software, kept up to date
- monitoring
- DNS and authentication records
- daily backups kept off the server
You run your users and your mail: your mailboxes, your own devices and what you send.
How the move works
- Scope. Tell us your domains, how many mailboxes you need, how much mail you hold and how you send today.
- Quote. One price for the server, management, backups and support, sized to your mail.
- Build. We set up your server and your domains' records before any mail moves.
- Move. Existing mail is brought across, and DNS is switched once the server is ready.
- Run. Noiz runs the server; you manage your users.
Ask for a quote
No two organisations hold the same mail, so Private Email is quoted for each deployment. Tell us your domains, mailboxes and how much mail you hold on the Private Email page, and we will come back with the server, the storage and the price. If your mail is better served by a hosting plan, we will say so.
Sources
Checked 19 October 2026.
Law
- Protection of Personal Information Act 4 of 2013 (sections 1, 19 to 21 and 72)
- Information Regulator: Acts and commencement
Sending reputation
Noiz
- Private Email
- Email hosting
- Why you should choose a private email server (the original article, noiz.ie)
Note: while some of this content was produced with the help of AI, the final editing has been done by a real human being.
