iMail Alternatives

iMail is described as 'Fast, safe, heavy mail solution. Web-client access, LAN or WAN self-hosted server, maintenance-free design. No Windows server and database server required, unlimited mail accounts, storage, attachment size, custom logo. Free for commercial use' and is a Mail Server in the online services category. There are more than 25 alternatives to iMail for a variety of platforms, including Linux, Online / Web-based, Windows, Self-Hosted solutions and Mac. The best alternative is Google Workspace. It's not free, so if you're looking for a free alternative, you could try mailcow: dockerized or Zimbra Collaboration Suite. Other great apps like iMail are Kolab Community, Zentyal, SOGo and Kolab Now.

iMail alternatives are mainly Mail Servers but may also be WebMail Providers or Calendar Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of iMail.

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iMail

Paid • Proprietary
Mail Server

Windows
Self-Hosted

Fast, safe, heavy mail solution. Web-client access, LAN or WAN self-hosted server, maintenance-free design. No Windows...

Learn more about iMail

Google Workspace
Do you think this is a good alternative?
Yes
No
Paid • Proprietary
Mail Server
Team Collaboration Tool
Calendar App
Mac
Windows
Linux
Online
Chrome OS
49 alternatives to Google Workspace
Google Workspace (formerly Google Apps for Work / G Suite) is Google's encompassing selection of cloud apps for business, including customizable products under custom domain names. It features traditional office tools through Google Docs as well as communication and time...
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Google Workspace Features
1. Sync with Google CalendarGoogle Workspace can be synchronized with Google Calendar
2. Two-factor AuthenticationGoogle Workspace supports two-factor authentication (2FA).
Online collaboration
Google contacts integration
Sync with Google Drive
Google Sheets integration
Integrated Bulk Emailing
mailcow: dockerized
Do you think this is a good alternative?
Yes
No
Free • Open Source
Mail Server
WebMail Provider
Linux
Self-Hosted
18 alternatives to mailcow: dockerized
mailcow is a mail server suite based on Dovecot, Postfix, SOGo, Rspamd and other open source software, that provides a modern Web UI for administration.
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mailcow: dockerized Features
1. Dark Modemailcow: dockerized supports dark mode for comfortable usage in low light conditions.
2. Ad-freemailcow: dockerized doesn't contain any form of external advertising.
3. Two-factor Authenticationmailcow: dockerized supports two-factor authentication (2FA).
4. Mail Filteringmailcow: dockerized classifies email messages according to specified criteria, allowing you to automatically recognize fraudulent or spam messages.
5. Email Organizermailcow: dockerized allows you to take control of your inbox by filtering and control tools.
6. Spam Filtermailcow: dockerized can detect unsolicited, unwanted and virus-infected emails, calls, files, etc.
7. Support for Aliasesmailcow: dockerized supports aliases, so you can receive email without exposing your main email address
Self hosted mail
Support for Docker
ActiveSync
Modular System
Dockerized
Zimbra Collaboration Suite
Do you think this is a good alternative?
Yes
No
Freemium • Open Source
Mail Server
Calendar App
Team Collaboration Tool
Linux
Online
Self-Hosted
43 alternatives to Zimbra Collaboration Suite
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
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Zimbra Collaboration Suite Features
1. Real time collaborationMultiple users can work together in Zimbra Collaboration Suite simultaneously.
ActiveSync
Active Directory integration
Kolab Community
Do you think this is a good alternative?
Yes
No
Freemium • Open Source
Linux
Online
Self-Hosted
43 alternatives to Kolab Community
Kolab is entirely Free and Open Source Software (a.k.a. FOSS), and uses Open Standards. We’ll get to why this is important to us, and hope that it is important to you thereafter.
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Kolab Community Features
1. Real time collaborationMultiple users can work together in Kolab Community simultaneously.
CalDAV Support
WebDAV Support
IMAP Support
CardDAV Support
Add a screenshot
Zentyal
Do you think this is a good alternative?
Yes
No
Paid • Open Source
Mail Server
Linux Distro
Linux
28 alternatives to Zentyal
Zentyal is a native Microsoft Active Directory implementation on Linux incorporating all the network services required in a small and medium business environment: Directory & Domain Server, Mail Server, Gateway and Infrastructure Server.
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Zentyal Features
Gateway
Member Directory
Web interface
SOGo
Do you think this is a good alternative?
Yes
No
Freemium • Open Source
WebMail Provider
Linux
Online
Thunderbird
Cloudron
65 alternatives to SOGo
SOGo is groupware server with a focus on scalability and open standards.

SOGo provides a rich AJAX-based Web interface and supports multiple native clients through the use of standard protocols such as CalDAV, CardDAV and GroupDAV.Share your calendars, address books and mails in.
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SOGo Features
Support for Multiple Users
Scheduling
CalDAV Support
CardDAV Support
Kolab Now
Do you think this is a good alternative?
Yes
No
Paid • Open Source
Calendar App
Mail Server
Cloud Storage Service
Online
Software as a Service (SaaS)
DAVdroid
78 alternatives to Kolab Now
Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.
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Kolab Now Features
1. Support for AliasesKolab Now supports aliases, so you can receive email without exposing your main email address
2. Real time collaborationMultiple users can work together in Kolab Now simultaneously.
3. Privacy focusedKolab Now is considered a privacy friendly alternative.
4. End-to-End EncryptionKolab Now has E2E Encryption, for entire or parts of the app.
CalDAV Support
WebDAV Sync
CardDAV Support
Kopano
Do you think this is a good alternative?
Yes
No
Paid • Open Source
Mail Server
Email Client
Mobile Device Management (MDM) Tool
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
Windows Phone
iPad
Self-Hosted
Microsoft Office Outlook
S/MIME
Software as a Service (SaaS)
25 alternatives to Kopano
Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface.
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Kopano Features
1. Real time collaborationMultiple users can work together in Kopano simultaneously.
On-premises software
Shared Calendar
CalDAV Support
IMAP Support
S/MIME Support
POP3 Support
OX App Suite
Do you think this is a good alternative?
Yes
No
Free • Open Source
Mail Server
WebMail Provider
Calendar App
Linux
Online
Self-Hosted
Software as a Service (SaaS)
20 alternatives to OX App Suite
The OX App Suite by Open-Xchange is web-based platform offering a suite of apps like an email client, calendar, contacts magement, cloud storage with synchronization and productivity apps for word processing, spreadsheets and presentations.
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OX App Suite Features
1. Real time collaborationMultiple users can work together in OX App Suite simultaneously.
2. Cloud SyncSync your data (notes, documents, bookmarks, etc.) across your different devices and to the cloud.
3. Calendar IntegrationOX App Suite lets you sync your tasks and events with your calendar application.
Personal Information Manager (PIM)
Group Mail
German
WebDAV Support
WebDAV Sync
hMail Server
Do you think this is a good alternative?
Yes
No
Free • Open Source
Mail Server
Windows
25 alternatives to hMail Server
hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world.
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hMail Server Features
IMAP Support
Convert images to PDF
SMTP Support
POP3 Support
Discontinued
hMail Server is no longer supported by the people who created it and has been discontinued – so use it at your own risk.