Top IncrediMail Alternatives: Mailbird, Outlook & More in 2025
IncrediMail, a popular email client, was discontinued on March 20, 2020, prompting users to seek alternatives. This article reviews the best alternatives available in 2025, including Mailbird, Outlook, Thunderbird, and Mailspring. Each alternative offers features such as unified inboxes, integration capabilities, and enhanced productivity tools that surpass IncrediMail’s functionalities.
IncrediMail (later acquired by Perion) officially shut down on March 20, 2020, leaving many users without their favorite email app. By 2025, email remains indispensable for communication, so switching to a modern, supported client is critical. Today's best Windows email clients offer far more functionality than IncrediMail ever did – unified inboxes for multiple accounts, integrated calendars and third‑party apps, robust spam filtering, and even email read‑tracking. For example, Mailbird lets you manage email, calendars, and productivity apps from a single dashboard, streamlining your workflow in ways IncrediMail never could. Below we review top alternatives – Mailbird, Microsoft Outlook, Mozilla Thunderbird, and Mailspring – highlighting each one's features and how they compare as IncrediMail replacements.
Fortunately, some replacements for IncrediMail support both IMAP and POP protocols, letting you migrate all your email accounts to one inbox. Email clients such as Mailbird let you manage calendars and productivity apps from one dashboard, boosting productivity and focus and providing an even better experience.
What Is IncrediMail? A Brief Overview
IncrediMail was a popular email client before it was discontinued in 2020. It hosted several productivity features and customization options that made email management easier.
Features
- Unified inbox. It supported IMAP and POP protocols. You could easily connect several accounts, including Gmail, Hotmail, Yahoo, and more email providers.
- HTML mail formatting. The app would let you access many formatting options when composing a new message to improve its overall appearance.
- Easy imports and exports. Data migration to a hard drive or USB was easy.
- Customization options. You could apply different skins or wallpapers and customize the appearance of each recipient's emails.
- Spellchecker. The app helped eliminate mistakes, but its language support was limited to English.
- Advanced address book. IncrediMail users could unite popular contacts into groups and assign graphics to each contact.
- Email preview. The email client offered a visual preview where email content was displayed together with images in two rows.
Integrations
None
Pricing
Free version and a paid subscription — at $19/user.
Reviews
n/a
The Pros and Cons
- IMAP and POP supported
- Highly visual and customizable
- Advanced contact filtering
- Simple backups
- Dated user interface
- Lack of integrations
- Limited productivity features
- Frequent glitches and errors
Best IncrediMail Alternatives in 2025
For this email client, we have chosen the following applications:
- Mailbird for great account management and productivity features;
- Outlook as a Microsoft product alternative;
- Thunderbird for a good free alternative;
- Mailspring for cross-platform functionality with email tracking.
1. Mailbird
If you were a big fan of the old Perion's customization options, such as backgrounds and custom effects, Mailbird could become your top choice. Mailbird is an intuitive, feature rich, smart, and highly customizable email client. But its superpowers are not limited to just a few productivity options—Mailbird lets you manage all your work from one interface with dozens of integrations and unique features.
Mailbird Features
- Unified inbox. You can connect and access all your emails from a unified inbox. Similar to the IncrediMail desktop application, you can connect all POP and IMAP accounts.
- Color codes. Color-coding emails in Mailbird helps easily distinguish different accounts.
- Productivity features. The list of productivity features in Mailbird is extensive. You can access in-line replies, speed reader, email snooze, attachment reminders, attachment drag-and-drop, identities, quick action bar, unsubscribe button, folders, and many more.
- Spam filtering and blocking. Block Sender moves unwanted mail to spam while the one‑click Unsubscribe removes newsletters instantly.
- Email tracking. See when recipients open your emails with built-in read receipts.
- Customization. You can adjust email backgrounds, choose between light and dark themes, colors, welcome message, message sound, and many more.
- Responsive support. You won't be left alone if you encounter some issue—support agents are easily accessible and respond fast.
- Shortcuts. You can use a combination of letters to perform an action fast.
- Simple migration. It's easier to migrate your IncrediMail emails to Mailbird — just follow these steps.
Integrations
The integrations list in Mailbird is impressive. You can use Slack, WhatsApp, Zoom, Asana, Evernote, and dozens of other apps right next to your emails without switching tabs.
Pricing
Free (with paid plans for advanced features)
Mailbird Reviews
| Mailbird | IncrediMail | |
|---|---|---|
| Interface | Modern and intuitive, it lets you manage all your apps, emails, and calendars without switching tabs | Dated interface |
| Supported accounts | IMAP and POP | IMAP and POP |
| Speed | Fast | Frequent glitches on updates |
| Customization | Color-coding, a variety of themes, identities, email backgrounds | Assigning graphics to contacts, various themes, font style preferences |
| Contact management | Linking, copying, and moving contacts in an intuitive way (drag-and-drop); attachment and communication history view | Creating groups, contact customization |
| Productivity features | In-line replies, speed reader, email snooze, attachment reminders, attachment drag-and-drop, identities, quick action bar, unsubscribe button, folders, email tracking, spam blocking | Advanced message filtering, simple data imports and exports, animated notifications, spellchecker, voice messages |
| Integrations | Dozens of integrations in a unified dashboard | None |
| Price | Free (with paid plans) | $19 (+ free subscription) |
| Reviews | 4/5 | n/a |
2. Outlook
Outlook is an email application that has built many productivity features and an extensive library of add-ins. You can connect multiple email accounts, manage calendars from different email providers, and create tasks. The new Outlook app for Microsoft 365/Office supports unified inboxes and integrates tightly with Windows 10/11. This email client's interface is more modern than the old-style Perion dashboard.
Outlook Features
- Unified inbox. Similar to IncrediMail, Outlook integrates with POP and IMAP.
- Unified calendar and sharing. You can connect and access calendars belonging to different email providers from one calendar pane.
- Keyboard shortcuts. Outlook allows for various shortcuts that make working with email messages and calendars much faster.
- Quick parts. With Outlook, you can create templates or use existing ones to spend less time creating emails, meeting requests, or appointments.
- Tasks. You can easily create a task, add its description, and assign it to team members.
- Smart alerts. You can get email notifications at the top of all opened windows.
Integrations
You can use native add-ons or integrate with third-party tools through Microsoft's ecosystem.
Pricing
From $5.99
Client Reviews
G2 - 4.4/5
| Outlook | IncrediMail | |
|---|---|---|
| Interface | More modern interface, but it can feel cluttered | Dated interface |
| Supported accounts | IMAP and POP protocols supported | IMAP and POP protocols supported |
| Speed | Occasional glitches | Frequent glitches on updates |
| Customization | Basic customization | Assigning graphics to contacts, various themes, font style preferences |
| Contact management | Rich filtering options | Creating groups, contact customization |
| Productivity features | Tasks, calendar sharing, email recall, email delay and scheduling, smart alerts, email snooze | Advanced message filtering, simple data imports and exports, animated notifications, spellchecker, voice messages |
| Integrations | Various Microsoft ecosystem integrations | None |
| Price | $5.99 | $19 + free subscription |
| Reviews | 4.4/5 | n/a |
3. Thunderbird
Thunderbird is a free, open-source email application that lets you connect unlimited accounts. Similar to Perion, it supports POP and IMAP. Thunderbird is still actively maintained by its community and receives regular updates, so you can continue using it with confidence.
Thunderbird Features
- Open-source project. Unlike with IncrediMail, code editing and customizations are possible (if you have time to tweak the code).
- Unified inbox. Thunderbird users can add unlimited email accounts that support POP, IMAP, and SMTP protocols and manage them from one inbox.
- Unified calendar. You can connect calendars from different accounts and view them as one calendar.
- Advanced spam filtering. Your email accounts are protected thanks to advanced algorithms Thunderbird uses to filter suspicious email messages.
- Tabbed email. You can view multiple emails in tabs, but it's less intuitive compared to email views of other more modern clients.
Integrations
Only the library of add-ons. There are no integrations with productivity tools.
Pricing
Free
Client Reviews
G2 - 4.3/5
| Thunderbird | IncrediMail | |
|---|---|---|
| Interface | A bit more intuitive interface | Dated interface |
| Supported accounts | IMAP and POP | IMAP and POP |
| Speed | Can encounter glitches on load | Frequent glitches on updates |
| Customization | Basic customization | Assigning graphics to contacts, various themes, font style preferences |
| Contact management | Advanced contact filtering | Creating groups, contact customization |
| Productivity features | Attachment reminder, large file management, smart folders | Advanced message filtering, simple data imports and exports, animated notifications, spellchecker, voice messages |
| Integrations | No integrations with third-party tools | None |
| Price | Free | $19 + free subscription |
| Reviews | 4.3/5 | n/a |
4. Mailspring
Mailspring is a free, cross-platform email client that offers modern features including a unified inbox and built-in email tracking. Mailspring supports read receipts and link tracking in its free version, making it an excellent choice for users who want advanced features without paying.
Mailspring Features
- Cross-platform compatibility. Works on Windows 10/11, Mac, and Linux.
- Unified inbox. Connect multiple IMAP and POP accounts and manage them from one interface.
- Email tracking and read receipts. Built-in tracking shows when recipients open emails and click links.
- Modern interface. Clean, intuitive design that's more modern than IncrediMail's dated interface.
- Advanced search. Powerful search functionality to find emails quickly.
- Snooze and scheduling. Delay emails and schedule them to be sent later.
Integrations
Limited integrations compared to Mailbird, but supports basic calendar and contact syncing.
Pricing
Free (with paid plans for advanced features)
Client Reviews
G2 - 4.1/5
| Mailspring | IncrediMail | |
|---|---|---|
| Interface | Modern and clean design | Dated interface |
| Supported accounts | IMAP and POP | IMAP and POP |
| Speed | Fast and responsive | Frequent glitches on updates |
| Customization | Themes and basic customization | Assigning graphics to contacts, various themes, font style preferences |
| Contact management | Basic contact management | Creating groups, contact customization |
| Productivity features | Email tracking, read receipts, snooze, scheduling | Advanced message filtering, simple data imports and exports, animated notifications, spellchecker, voice messages |
| Integrations | Limited integrations | None |
| Price | Free (with paid plans) | $19 + free subscription |
| Reviews | 4.1/5 | n/a |
What Is the Best Alternative to IncrediMail?
IncrediMail is no longer supported, but people used it for years because it helped manage multiple accounts and offered interesting customization features. However, it's time to move away from this email app and find a decent replacement for the discontinued client. Let's summarize our findings in the table below to find the top email apps you can start testing.
| IncrediMail | Mailbird | Mailspring | Outlook | Thunderbird | |
|---|---|---|---|---|---|
| Unified inbox and calendar | 3⭐ | 5⭐ | 4⭐ | 5⭐ | 4⭐ |
| POP3, IMAP, and SMTP servers support | 5⭐ | 5⭐ | 5⭐ | 5⭐ | 5⭐ |
| Speed | 3⭐ | 4⭐ | 4⭐ | 4⭐ | 4⭐ |
| Customization options | 4⭐ | 5⭐ | 3⭐ | 3⭐ | 3⭐ |
| Productivity features | 4⭐ | 5⭐ | 4⭐ | 4⭐ | 4⭐ |
| Integrations | 1⭐ | 5⭐ | 2⭐ | 3⭐ | 2⭐ |
| Reviews | n/a | 4/5 | 4.1/5 | 4.4/5 | 4.3/5 |
| Price | Free or $19 | Free (with paid plans) | Free (with paid plans) | From $5.99 | Free |
As you can see, Mailbird seems to outrank IncrediMail and the reviewed apps for several reasons. It's the most modern and intuitive and offers more productivity features and integrations.
What's more important — it's not just an app for bringing your email accounts together. It helps you do all your work from one place — a unified dashboard. As a result, you can stay focused and do more work in less time.
Move your accounts to Mailbird safely and fast — download Mailbird for free.
How We Tested Different Email Clients?
In our pursuit to determine the best email clients in the market, we meticulously implemented a thorough testing process. This involved setting up accounts with each email client, whether as a standalone software platform or as a cloud-based service. Our aim was to explore the capabilities of each platform in various scenarios, putting their functionalities to the test in order to assess their overall performance.
We carefully evaluated the basic tools and functionality of each email client, and then explored its advanced features to determine their ease of use and accessibility. This comprehensive approach enabled us to provide an in-depth evaluation of each email client's strengths, weaknesses, and suitability for different use cases.
FAQ
Why did IncrediMail shut down?
IncrediMail was discontinued by its owner (Perion) on March 20, 2020. It had become outdated and unsupported, so Perion closed its email service and apps. In other words, it's no longer maintained, which is why users must migrate to a new client.
How can I transfer my IncrediMail emails to a new client?
If your IncrediMail account used IMAP/POP, simply add the same account in the new client to sync all mail. If emails were stored locally, you may need to export them. For example, Thunderbird users can install the ImportExportTools add-on and import IncrediMail's mailbox files (MBOX) into Thunderbird's "Local Folders". Other clients often have migration guides or import tools for legacy formats.
Is Mailbird a good replacement and is it free?
Yes. Mailbird offers a free tier and includes many features that IncrediMail users will appreciate. It provides a unified inbox for multiple accounts, dozens of app integrations (Slack, WhatsApp, Zoom, etc.), one-click unsubscribe and Block Sender spam filtering, plus email open-tracking. These features make it a powerful replacement. Mailbird is now free for unlimited accounts, with paid plans unlocking extra features like unlimited email tracking.
What about other free alternatives?
Mozilla Thunderbird and Mailspring are completely free. Thunderbird is open-source and works on Windows, Mac, and Linux; it supports POP/IMAP accounts and offers strong filtering. Mailspring (free version) also supports a unified inbox, read‑receipts, and link tracking. TechRadar's 2025 roundup even lists Thunderbird and the new Outlook among the top email clients.
Do any alternatives still offer fancy animations or emoticons like IncrediMail did?
No. IncrediMail's signature animated greetings and e‑cards aren't available in these clients. Modern email clients focus on practical features (unified inbox, security, productivity) rather than animations. You can still use emojis and HTML background images in Thunderbird or Mailbird (both allow custom email backgrounds), but the old IncrediMail animations are unique and not supported by current software.
Will IncrediMail work with Windows 10?
Unfortunately, the IncrediMail email client has shut down. Alternatively, you can use Mailbird for Windows 10/11. Follow these steps to migrate its data. Mailbird is a Windows-supported alternative well-known for its unified inbox functionality, customization options, time-saving features, and many integrations.
How do I install IncrediMail on Windows 10?
Unfortunately, it is no longer possible to install IncrediMail for Windows 10/11, as it was discontinued. However, there are many awesome alternatives, such as Mailbird. To install Mailbird, follow these steps:- Go to getmailbird.com.- Click on the Free Download button.- Wait for the .exe file to load and open it.- Go through all the steps in the Mailbird Installer. Done. Launch the app and start testing all the features.
Is IncrediMail still supported?
No. As of March 20, 2020, the app has been discontinued. You can easily switch to a more powerful and reliable IncrediMail replacement — Mailbird. Follow these steps to migrate IncrediMail data. In Mailbird, you can add all your email accounts and calendars and manage all productivity work tools from one unified dashboard.
What is the latest version of IncrediMail?
The last working version was IncrediMail 2.5. However, since March 2020, the app is no longer supported. You can try Mailbird instead. It is way more affordable for an equivalent set of time-saving inbox management features and more.
