With Kalabash Mail, you can deploy a FULL FLEDGEDand a FULLFEATURED mail server in minutes with total control over your data with a minimal Total Cost of Ownership.

We have done all the heavy lifting by putting all the components together using industry best practices. Our product does all the major tasks for you. In addiion we offer professional support to back you up in case you have some problems.

Why Kalabash Mail


You have all personal data on your own hard disk, you can control the email security, inspect transaction log. No other organization can see the content of all messages.


Allow users to login to manage their own preferences like password, mail forwarding, white/blacklists, quarantined mails, basic spam policy.

Secure out of the Box

End users are forced to use mail services through secure connections (POP3/IMAP/SMTP over TLS, webmail with HTTPS). Emails are encrypted in transit using TLS 1.2 minimum. Passwords are stored in SSHA512 or BCRYPT (BSD).


Manage mails, folders, sieve filters, vacation directly on a intuitive and easy to use web UI (Roundcube webmail or/and SOGo groupware).


Manage your calendars (CalDAV), address books (CardDAV), tasks on a easy to use web UI or your mobile devices

Unlimited Accounts

Forget about the products which pricing based on number of mailboxes, you can create as many mail accounts (domains, users, mailing lists, admins) as you want.

Solid Backend Services

Kalabash Mail works on Red Hat Enterprise Linux, CentOS, Debian, Ubuntu, FreeBSD, OpenBSD. No matter you switch to which Linux/BSD distribution supported by Kalabash Mail, you get the same setup in just few minutes.

Stores mail accounts in your favourte backend database: MySQL, MariaDB, PostgreSQL.

Antispam & Antivirus

Manage greylisting, whitelists, blacklists, spam policy, quarantined emails. You can even whitelist or blacklist sender/recipient in quarantined mails with one click.

Kalabash comes with SpamAssassin, ClamAV, SPF, DKIM, DMARC, greylisting, whitelisting, blacklisting. Quarantining detected spam into SQL database for further review.

Per-user Service Control

Just one click to enable or disable mail services for mail user: POP3, IMAP, SMTP, sieve filter, mail forwarding, BCC, and more.

Allow users to login to manage their own preferences like password, mail forwarding, white/blacklists, quarantined mails, basic spam policy.

Domain Level Web Admin Panel

Manage your mail accounts with a web admin panel.

Either promote a mail user to domain admin role, or create a separated domain admin account to manage his/her own mail domains.

Reproduceable Deployment

Get a reproduceable, easy to use, flexible, stable mail server in just few minutes, easy to migrate an old server, or restore a crashed server to new Kalabash Mail server.

Professional Tech Support

We back you up with fast and professional tech support. Check our full support services list.


Global, per-domain and per-user throttling based on: max size of single message, number of max inbound/outbound messages per time unit.


Search accounts with domain name, email address, display name. You can also manage searched accounts in search result page, such as enable/disable/delete account.

Log Admin Activities

Kalabash Admin logs normal admin activities, such as account creation, activation, removal, password change, and more.

Messages log

The main purpose of a mail server is to relay messages in and out. Most often you need to know if a given message has been handled by your server and if the delivery was succesful.

This feature lists all sent and received messages, with a search bar to filter by domain or address.

Two-Factor authentication

Access to the Kalabash web interface is protected by a username / password combination. This is not enough to ensure system's security. To improve this, another layer of authentication is added by requesting a One Time Password after a succesful login.