Platform choice and install
Microsoft Exchange on Windows Server, or Zimbra or Postfix with Dovecot on Linux, chosen by user count and the need for shared calendars.
Servers & Hosting
Business email server setup and support
Messages landing in customers' spam folders, or a mailbox nobody can open after a colleague leaves, usually trace back to an incomplete mail server setup. A properly planned email server setup gives you mail on your company domain, on a server you own, configured so your messages get delivered. Depending on company size, we recommend Exchange, Zimbra or an open-source Postfix stack.
Tools & technology
email-server
- Microsoft Exchange
- Zimbra
- Postfix
- Dovecot
- Rspamd
- ClamAV
- Roundcube
- Outlook
- Let's Encrypt
6work areas
4deliverables
4steps
What is Business Email Server?
Email server setup for businesses means installing and configuring mail on your company domain, on a server you own, so that messages reach inboxes. It fits companies whose emails land in customers' Gmail spam folders, whose staff write from personal accounts, or who do not want company correspondence on a foreign service. Depending on company size, PikoSystem installs Microsoft Exchange, Zimbra or Postfix with Dovecot, sets MX, SPF, DKIM, DMARC and PTR records and tests them with mail-tester, adds spam and malware filtering with Rspamd and ClamAV, connects sign-in to Active Directory, configures Outlook and mobile sync, and migrates existing mail with IMAP sync or the Exchange migration tools. You receive a running mail server with admin access, DNS records with deliverability test results, a staff setup guide and a mailbox backup and restore procedure.
When you need Business Email Server
- Our emails land in customers' Gmail spam folders.
- Staff write to customers from personal email accounts.
- Mailboxes are full and messages bounce.
- We do not want company correspondence on a foreign service.
What Business Email Server includes
DNS records and deliverability
MX, SPF, DKIM, DMARC and PTR records, tested with tools such as mail-tester before real use begins.
Spam and malware filtering
Inbound filtering with Rspamd or SpamAssassin and ClamAV, blocklists and rules for high-risk attachments.
Access security
A valid TLS certificate, no open relay, limits on failed logins and, where needed, two-factor sign-in for webmail.
Directory and client integration
Sign-in with Active Directory accounts, Outlook and Thunderbird setup, and mobile sync.
Backup, retention and quotas
Daily mailbox backups, an email retention policy and per-user storage quotas.
What you get from Business Email Server
- A running mail server with admin access handed to you
- A list of DNS records and the deliverability test results
- An Outlook and mobile setup guide for your staff
- A mailbox backup and restore procedure
Business Email Server: a practical guide
Is Exchange Server 2019 still the right choice?
Exchange 2016 and 2019 reached end of support in October 2025 and no longer receive security updates. Their successor, Exchange Server Subscription Edition, allows an in-place upgrade from Exchange 2019 CU14 or CU15 but requires subscription licensing. Before installing, we check whether that license can be obtained through a legitimate route. If it cannot, Exchange is not a sustainable choice for your company.
The alternatives run on Linux: Zimbra, or Postfix and Dovecot with Roundcube or SOGo for webmail. SOGo syncs calendars and contacts to phones over ActiveSync and to Thunderbird over CalDAV, which covers most of what staff actually use.
What to prepare before setting up a business email server
Many VPS providers block outbound port 25 by default, and until they approve a request to open it, your server cannot deliver mail to anyone. Before work starts, make sure you have a static IP, the ability to set a PTR record, and access to your domain's DNS management.
Put together a list of mailboxes, aliases such as info and sales, and the current size of each mailbox. If staff have been using POP3, their old mail lives only in PST files or Outlook folders on their own PCs, and it has to be migrated separately from the old server.
Common mistakes after an email server goes live
DMARC records are usually created with p=none to collect reports, then left that way for years, where they do nothing to stop spoofing of your domain. Once the rua reports show legitimate mail passing, the policy should move to quarantine and then to reject.
Missing per-account sending limits are another problem. One leaked staff password is enough for the server to send thousands of spam messages overnight and land its IP on Spamhaus. On Exchange, a backup that is not Exchange-aware never truncates the transaction logs, and the database disk slowly fills up.
What does an on-premises mail server need after handover?
TLS certificates on ports 465, 587 and 993 must be renewed before they expire, or staff Outlook clients stop with certificate errors. The server IP's blocklist status, the outbound queue (mailq on Postfix) and DMARC reports need regular checks.
Do not postpone security updates. Mail servers are a frequent target, and vulnerabilities such as ProxyShell in Exchange were still being exploited on unpatched servers long after the fix was released.
How Business Email Server works
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01
Requirements
We look at user count, your current email service, the need for calendars and shared mailboxes, and where the server should run.
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02
Domain and server preparation
We prepare the server, request a static IP and PTR record from the provider where needed, and plan the DNS changes.
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03
Install and mailbox migration
The server is installed and configured, and existing mail is moved with IMAP sync or the Exchange migration tools.
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04
Testing and handover
We test sending, receiving and spam scores, switch the MX record at a quiet time, and hand over access and guides.
Business Email Server: frequently asked questions
Why does our business email go to spam?
Usually one of the SPF, DKIM or DMARC records is missing, the PTR record does not match the server name, or the server IP is on a blocklist. We find and fix these with proper testing. If the IP is blocklisted, we also file the delisting request.
Should we choose Exchange or Zimbra?
Exchange works closely with Outlook and Active Directory but needs Windows Server and Exchange licenses. Zimbra runs on Linux and its open-source edition has no license cost. The choice depends on user count, budget and how much you rely on shared calendars and resources.
Should the mail server be on-premises or on a VPS?
An on-premises server keeps your data fully under your control but needs a static IP and a stable internet line. A VPS in a data center avoids those constraints. Many companies combine the two, with an edge server receiving mail and the mailboxes kept in-house.
Can you migrate email to the new server?
Yes. Messages and folders are migrated, plus contacts and calendars where the old service allows it. The MX record is switched when inbound mail is lowest, and a final sync picks up anything that arrived in between.
Related searches
- business email server
- Exchange server setup
- Zimbra setup
- email on company domain
- SPF and DKIM setup
- migrate email to new server
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Quote
Tell us what you need, we'll come back with a plan and a price
A few lines on where things stand and what you want is enough. An engineer calls you back, not a sales rep.
- 01We read your request and call if anything is unclear.
- 02If needed, we do a quick remote review or a site visit.
- 03You get a written proposal with scope, timeline and cost.