Kerio Connect

Kerio Connect

Kerio Connect is designed specifically for small-to-medium sized businesses.

Kerio Connect is a mail server and an all-in-one collaboration tool deployed by more than 30-thousand companies around the world. It can be installed on multiple operating systems, including Windows, Mac OS and Linux.

Kerio Connect is just the right size for SMBs with smaller budgets and limited IT staff. It’s easy to manage, easy to deploy and typically costs less than “big brand” solutions.

Secure, business-style email, calendar & collaboration without the high cost

With so many email solutions available, what should you choose? It may seem easy to pick among the big brands, but big brand options come with big brand challenges.

As a business grows, a business’s communications need to keep pace. Employees need an easy and reliable way to connect with each other, with customers, prospects, suppliers and more.

Email, calendar and instant messaging are business essential credentials. Individuals can use free email and calendars by giving up privacy and accepting ads, however a company needs to think about their own email domain and better security and control over data. This means paying for communication tools.

With so many email solutions available, what should you choose? It may seem easy to pick among the big brands, but big brand options come with big brand challenges.

For better security, businesses may look at on premises email server offerings from a big brand. They attempt to cover all business sizes with one solution. For SMBs however, this results in a complex solution and a premium price tag. Large corporations might be able to afford and manage these systems, but they are far less than ideal for small and medium businesses with limited It resources and budgets.

Cloud offerings from the same big brands have drawbacks too. Big brand cloud solutions are bloated with unnecessary services that increase the complexity of management, with businesses having to pay extra for tools that are not needed. 

Most well known communications plus productivity suites come with spreadsheets, document management, slide creation and cloud storage, all bundled in the plan. Not everyone in the business needs to write reports, crunch ledgers or prepare sales presentations every day, resulting in overpaying for the business essentials of email accounts, calendars and communications. 

Understanding the requirements of growing businesses Kerio Connect is purpose built for the SMB. Easy usability is front and centre for both end users and It administrators. While our pricing is clear and affordable, Kerio Connect focuses on the essential communication features: email with your own domain, companywide calendars and instant messaging. 

It delivers identical capabilities as the big brand offerings, meaning there is no learning curve or loss of functionality. Client apps are available for Windows, macOS and Linux, with full support for your existing clients like Outlook and mobile device apps. 

Security is built into Kerio Connect from the foundations. Users are protected against hacking and malicious attacks with encryption, antispam and antivirus tools, while automated backups with granular restore options ensure quick and easy recovery from all types of disasters. 

Flexible hosting is another key benefit. If a managed email experience with minimal It overhead is preferred, choose Kerio Connect as a cloud service. In this model, trusted GFI partner hosts the email server for the business. They take care of all maintenance and update tasks, enabling the business to enjoy the benefits of a simple and secure email solution. 

In many cases, however, moving email to the cloud is not an option, especially in industries that have to comply with strict privacy and security regulations. Businesses keep full control over their business communication data with Kerio Connect as an on premises email server managed by their in-house IT staff.

Installing and configuring, Kerio Connect is extremely simple. It takes about 20 minutes and requires only basic IT knowledge. It can be deployed on Windows, Linux or even Mac OS. Kerio Connect also comes with powerful management features as standard to help IT administrators save valuable work hours. These include active directory integration for easy user management, built in automated backup for recovery and archiving, and detailed reports to gain actionable insights, just to name a few. 

Save money, ensure security, and get enterprise level email, calendar and instant messaging at a value price. Get started with Kerio Connect today.

Kerio Connect Feature Summary

Email, Calendar, IM and More For Less

  • Kerio Connect delivers all the features and functionality for collaboration and messaging solution without the complexity and high price tag of other systems
  • Email is integrated with shared calendars and scheduling, contacts management, tasks, notes, shared and public folders, and instant messaging.
  • Synchronize messages by direct push to your choice of mobile device via Microsoft ActiveSync(R)
  • Instant Messaging is XMPP-compatible and can be used from various 3rd party chat/IM applications on desktop and mobile phones

Easy To Deploy, Manage and Use

  • You can install Kerio Connect in 10 minutes and users can be up and running in just 10 minutes more
  • Kerio Connect can be deployed on-premises or in partner-hosted cloud environments
  • Deploy for users on Mac, Windows, or Linux; plus full support for Outlook (Windows and Mac) and many other IMAP or POP compliant email clients
  • Kerio Connect web-based administration is simple and can even be configured from a tablet

Security Built Into Your Business Email

  • You’re protected against hacking and malicious attacks with SSL encryption, S/MIME, anti-spam and anti-virus tools making sure your email is clean.
  • Automated backup with granular restore options ensure quick and easy recovery from all types of disasters.
  • Server-wide archiving prevents data loss and helps organizations to comply with legal requirements for email retention.

Kerio Connect Features In Detail

Kerio Connect is a messaging and collaboration solution alternative to the big brands that meets the needs and price-point of small and mid-sized businesses with a robust feature lineup.

Deliver full-featured business-class email & more

Email is integrated with shared calendars and scheduling, contacts management, tasks, notes, shared and public folders and instant messaging. Synchronize with direct push to your choice of mobile devices.

Kerio Connect Client via a web browser allows users to see the presence of colleagues, chat in real-time, organize meetings and securely compose richly formatted email.

Utilize the Kerio Connect Desktop App for Windows or Mac with all the features of Kerio Connect Client in a stand-alone application.

Full support for Outlook (Windows and Mac), native apps for Mac OS, and any other IMAP or POP compliant email client.

Streamline Team Communication

Organize contacts into as many groups as you wish and share them with coworkers.

Create tasks and notes, sort them into groups, assign tasks to and share notes with colleagues.

Schedule events, check attendee availability, and reserve conference rooms or other shared resources.

Create recurring events and receive meeting reminders in your inbox.

Enjoy time saving features like full-text search, address auto-complete, quick preview of attachments and draft auto-save.

Email features:
  • IMAP, POP3 and EWS protocol support
  • Multiple email addresses per user
  • Email aliases
  • Public and shared folders
  • Out of Office messages
  • Message filters and rules
  • Delegation
  • User managed spam whitelist
  • Delivery and read receipt
  • Multi-language support
  • Full text search
  • Desktop notifications


Calendar and tasks features:
  • Synchronization (CalDAV and EWS)
  • Public and shared calendars
  • Privacy flag
  • Scheduling and response tracking
  • Recurring events with exceptions
  • Reserve conference rooms/resources
  • Labels
  • Free/Busy assistance
  • Reminders
  • Delegation
  • Travel time
  • Comment on invitation replies
  • Print view
  • Agenda view
  • Tasks with reminders
  • Search
  • Desktop notifications


Contacts features:
  • Synchronization (CardDAV and EWS)
  • Remote lookup (LDAP)
  • Public and shared contacts
  • Global address list
  • Create contact from email
  • Contact groups
  • Contact photos
  • Click to Call with Kerio Operator


Kerio Connect includes Chat for exchanging instant messages. Chat enables you to view your colleagues’ online status, and chat with them in real-time when you cannot wait for an email response, or need a quick back-and-forth conversation without a phone call. Business users can chat in real time with the Kerio Connect Client, or send and receive instant messages with their favorite XMPP/Jabber chat client.

Instant messaging features:
  • Jabber/XMPP protocol support
  • Group chat
  • Chat rooms
  • Presence
  • Web based chat
  • Global address list with photos
  • Desktop notifications

Kerio Connect allows you to use the synchronization method that best fits your users, so the information on your computer always matches up with what comes across on your device. Browse through public and shared folders and specify which you want sync’d with your mobile device. This feature cuts down on clutter and ensures that if you have got your mobile device in hand, you can instantly access shared folders, without shuffling through ones that aren’t relevant.

Offer smooth and seamless BYOD support
  • Provide support for a wide range of mobile devices—from iPhones and Android phones to tablets of all kinds – using Exchange ActiveSync or IMAP/CalDAV/ CardDAV protocols.
  • Secure communications with the SSL and S/MIME protocols to protect users on the go.
  • Enable end users to configure their own mobile devices without requiring assistance from IT.
  • Remotely delete suspicious files and other data from mobile devices to protect users from hacking or malicious activity.

Mobile features:
  • Exchange ActiveSync 14.1
  • CalDAV/CardDAV/IMAP client support
  • Global address list synchronization
  • Public and shared folders
  • Automatic configuration for iOS
Your choice of email client – Mac, Windows or Linux

Whether you’re a Mac, Windows or Linux user we’ve got you covered. Business users don’t care about mail servers. They simply care that their email works, that it is secure, and delivers the flexibility that users want and expect. When using Kerio Connect Client for Mac, Windows or a web browser, you can see the presence of colleagues, chat in real-time, organize meetings and securely compose richly formatted email.

Kerio Connect also provides full support for Outlook (Windows and Mac) and many other IMAP or POP compliant email clients. iOS users can set up an account in the popular smart mail application Spark by Readdle, using an integrated Kerio Connect profile.

Supported email clients
  • Kerio Connect Client (web based)
  • Kerio Connect Client (Windows & Mac)
  • Microsoft Outlook (Windows & Mac)
  • Windows 10 Mail and Calendar
  • Apple Mail, Calendar, Contacts, Messages, and Reminders
Your choice of platform deployment – Windows, Mac, or Linux.

Administrators can deploy on the operating system that best fit their environment and their needs. In addition to supporting Windows, Mac, or Linux, Kerio Connect can also support being hosted on hardware or virtual environments. It can scale to multi-server, multi-tenant deployments while maintaining the ease-of-use of day-to-day management.

Kerio Connect’s web based administration is clean and simple, and can even be configured from a tablet. Stay in control of all your Kerio deployments through a single centralized web interface — MyKerio.

One-click upgrades make it quick and easy to ensure your server is using the latest version, and managing users is a breeze with the straightforward licensing model. We meet your requirements with the best and most flexible messaging and collaboration server on the market.

Server management features:
  • MyKerio centralized web based management to monitor and manage multiple Kerio deployments
  • Remote web based administration
  • Administration API
  • Customizable login page
  • One-click software updates
  • Automated server backup
  • Multiple domains
  • Custom logo per domain
  • Distributed domains
  • Storage quotas and notifications per domain
  • SMTP server relay routing (smart host)
  • Email archiving per server and per domain
  • Moderated mailing lists with NNTP
  • Recover deleted items
  • Status, activity, and debug monitoring
  • Audit logs, charts, reports, and statistics
  • Message queue status & configuration
  • IMAP & Exchange migration tools
  • Domain Footers with variable fields
  • IPv6 Support

Manage your email users, storage quotas, public folders, resources and more through a simple web interface.

User management features:
  • Microsoft Active Directory
  • Apple Open Directory
  • Linux PAM
  • Local user database
  • Import user list
  • Account settings templates
  • Mailbox quotas and notifications
  • Access policies based on protocols
  • Data retention policy (Items clean-out)

Kerio Connect includes multiple layers of security features built right into the solution giving you the ability to protect your users and your network from malicious attacks.

Security features:
  • Password policy with complexity
  • Password guessing protection
  • Secure connectivity (TLS 1.2)
  • Require secure connectivity
  • Perfect Forward Secrecy support
  • Signed and custom SSL certificates
  • Encrypted email (S/MIME)
  • DKIM signatures
  • SMTP submission
  • Directory harvest attack protection
  • Sender anti-spoofing protection
  • Remote mobile device wipe

Get powerful identity and content protection with SSL encryption and S/MIME.

Reduce inbox clutter of unwanted messages with multiple layers of spam filtering.

Protect your network from viruses, Trojans, worms, spyware and adware while minimizing impact on memory and system performance with the Kerio Antivirus engine.

Block IP addresses suspected of account and password-guessing attacks, block accounts that have been targeted by password-guessing and even elect not to block guessing by local clients.

Leverage the Kerberos protocol to authenticate log-in attempts between a client and server or between servers.

Repel hacking and malicious behind-the-firewall activity by automatically filtering and disallowing suspicious attachments.

  • Integrated anti-virus (option)
  • Standard spam filter (SpamAssassin with SURBL)
  • Advanced spam filter: Kerio Anti-spam (powered by Bitdefender) (option)
  • Spam repellent (SMTP greeting delay)
  • Internet and custom blacklists
  • Greylisting
  • Anti-spoofing (SPF)
  • Attachment filtering
  • Server based filtering rules
  • Message size limits
Centralized administration

MyKerio simplifies the management of multiple Kerio Connect, Kerio Control and Kerio Operator deployments through a centralized web interface providing consolidated system information, automatic configuration backup, status monitoring, system notifications and complete remote configuration.

With single sign on capability, MyKerio establishes an encrypted communication channel to your deployments, allowing you to apply and share configuration settings remotely and securely without any prior configuration.

Anytime access

As a cloud based service with 24/7 availability, MyKerio remotely monitors your deployments, allowing you to view network, licensing, or system critical events the moment they occur.

Mobile monitoring and notifications

Get notifications straight to your mobile device with the MyKerio app for Android or iPhone/Apple Watch. You can be confident your appliances are online and if the status changes, you will be the first to know.

Rapid Remote Deployment

Deploy Kerio Control hardware appliances with self-provisioning in MyKerio. Avoid the expense and hassle of on-site administration and save time by setting up and configuring appliances remotely.