Outlook Express, Windows Mail, Windows Live Mail, Outlook for Mac and today’s two Outlook apps for Windows: Microsoft has used several names for the software we use to read email. Some replaced earlier products. Others existed alongside them. If your email app has changed and you are unsure what to use, JM Restart can help you understand the options and plan the change.
This is a look back at the main Microsoft email families, rather than a list of every build. Historical applications are included for context, not as software to download and use today. Current product information was checked on 9 October 2026.
Was the old email program Outlook Express?
If you remember a straightforward Microsoft email program from the Windows XP days, you may be thinking of Outlook Express. Despite the name, it was not an early edition of Office Outlook. The two were separate applications with different purposes.
Microsoft’s 1997 Internet Explorer announcement describes Outlook Express as the successor to Microsoft Internet Mail and News. It handled email and newsgroups, which were discussion groups accessed through a news service. That same announcement distinguishes it from the more comprehensive Microsoft Outlook desktop information manager.
The names at a glance
| Name | What it means |
|---|---|
| Outlook Express | An older email and newsgroup application, separate from Office Outlook. |
| Windows Mail and Windows Live Mail | Consumer email applications. Vista’s Windows Mail and the later Mail and Calendar apps are different generations. |
| Classic Outlook for Windows | The long-running Office desktop application family, including Outlook supplied with Microsoft 365. |
| New Outlook for Windows | A separate, newer Windows application, not simply a renamed update to classic Outlook. |
| Outlook for Mac | A Mac application with its own development history and legacy/modern experiences. |
| Outlook.com and Outlook on the web | Browser-based email experiences. Outlook.com is Microsoft’s consumer email service; Outlook on the web provides access to work or school mailboxes. |
| Outlook for iOS and Android | Mobile applications designed for phones and tablets. |
Outlook Express, Windows Mail and Windows Live Mail
Outlook Express became a familiar way to access internet email on older PCs. In the Windows XP era, Outlook Express 6 was still part of this story. Windows Vista used Windows Mail instead. Microsoft’s archived 2007 product documentation identifies Outlook Express on XP and Windows Mail on Vista. This is historical evidence, not current update advice.
Windows Live Mail was a separate application distributed through Microsoft’s Essentials suite. It was not the paid Office Outlook program, and “Live” did not mean that everything was necessarily stored online. The Windows Essentials 2012 suite, which included Windows Live Mail, reached the end of support on 10 January 2017. Microsoft no longer offers that suite for download. See Microsoft’s Windows Essentials support notice.
Later Windows PCs had another generation of Mail and Calendar apps. The reused Mail name can make these easy to confuse with Vista’s Windows Mail. Microsoft ended support for the later Mail, Calendar and People apps on 31 December 2024, with new Outlook providing the replacement route. Local information may need exporting rather than simply assuming it will appear in the replacement. Microsoft explains this transition and the export options.
Office Outlook and the classic Outlook family
Outlook 97 was introduced with Office 97, released in January 1997. It combined email, a calendar, contacts, tasks and a journal. It was designed as a wider organiser, not just an inbox. Microsoft’s Office 97 launch announcement describes Outlook as a new application in the suite.
That desktop family continued through Outlook 98, 2000, 2002 and 2003, followed by editions such as 2007, 2010, 2013, 2016, 2019, 2021 and 2024. Outlook 2002 belonged to the Office XP generation; it was not Outlook Express for Windows XP. The modern Microsoft 365 subscription version belongs to this Office desktop family too, although its updates are delivered differently from a fixed Office release.
Today, classic Outlook is the label used to distinguish this Windows application from new Outlook. “New Outlook classic” is not a separate product family: it usually means an updated version of the classic app. An old copy of Outlook and a current supported classic installation should not be treated as equally up to date simply because they share the same name.
The Mac story was different
Microsoft also offered Outlook Express for Mac. Separately, Outlook 2001 for Mac was designed for organisations using Exchange Server, Microsoft’s business email and collaboration platform. Its June 2001 announcement describes access to shared contacts, calendars and public folders. It was not just the Windows consumer application with a Mac interface.
Many Mac users will instead remember Entourage, the email and organiser application in earlier Office for Mac suites. Microsoft announced in 2009 that a newly developed Outlook for Mac would replace Entourage. The change involved a new Mac-native foundation and database, rather than just swapping the name. Read Microsoft’s Entourage-to-Outlook announcement.
Outlook 2011 for Mac arrived with the Office for Mac 2011 generation in 2010, followed by later Office and Microsoft 365 editions. A year in a product name is not always its actual release year. Microsoft’s Outlook 2011 lifecycle record also confirms that this historical edition is no longer supported.
Outlook for Mac has never been a feature-for-feature copy of Windows Outlook. Available add-ins, local archives, import/export tools and mailbox features can differ between versions. Its modern experience is also a separate development from new Outlook for Windows. Moving from Windows to Mac therefore needs a check of the actual tasks and data involved, not just whether both apps say Outlook.
A current Mac consideration: Microsoft says legacy Outlook for Mac stops working with Exchange Online mailboxes starting in October 2026. Exchange Online is the cloud email service used by many Microsoft 365 businesses. This does not mean every Outlook for Mac installation has stopped working. Microsoft’s notice describes a different position for eligible on-premises Exchange configurations. Check the current legacy Outlook for Mac notice before deciding what needs changing.
Hotmail, Outlook.com and Outlook on the web
Hotmail and Windows Live Hotmail belong to the email-service story, rather than being successive versions of the Windows desktop app. Outlook.com appeared in preview in 2012 and was formally launched in February 2013. Microsoft moved Hotmail users to the new experience while preserving their existing Hotmail addresses. That is why someone can still have a Hotmail address but use an Outlook-branded website. See Microsoft’s Outlook.com launch announcement.
The business browser experience has its own history, including Outlook Web Access, later Outlook Web App and today’s Outlook on the web. These provide browser access to an Exchange or Microsoft 365 mailbox. They should not be confused with the consumer Outlook.com service or a Windows application installed on your PC.
Think of the email service as where your mailbox lives, and the email application as one way to use it. Changing the application does not automatically change your email address, transfer a mailbox or preserve every local archive.
Outlook on phones and tablets
In January 2015, Microsoft launched Outlook for iOS and a preview of Outlook for Android, using the Acompli app’s code as their starting point. These brought email and calendars together in a mobile design. They were not the full Windows desktop Outlook running on a small screen. Microsoft’s mobile launch announcement explains this branch of the history.
Classic Outlook and new Outlook for Windows today
New Outlook for Windows is a different application, not the next numbered edition of classic Outlook. It reached general availability for commercial customers in August 2024. Microsoft’s staged migration approach allows comparison and testing; its documentation says existing classic Outlook installations will continue to be supported until at least 2029. That statement is not a blanket extension of every old Office edition’s own lifecycle. See Microsoft’s migration stages.
The practical question is whether the application supports the way you work. Check your mailbox type, shared calendars, add-ins, offline use and local archives. As checked in October 2026, Microsoft’s comparison lists offline and Outlook Data File (PST) support as partly available in new Outlook; it is no longer accurate to say it has no such support at all. Traditional COM add-ins and automation also need particular attention. Features change, so use the current Microsoft feature comparison rather than an old checklist.
How JM Restart can help
You do not need to untangle all these product names before asking for help. Tell us which device you use, the name shown in the application and what you need it to do. We can help identify the software, troubleshoot problems and plan an agreed change for home or business use.
- Check the application, mailbox provider and relevant licence or support requirements.
- Identify important local messages, contacts, calendars and archives before replacing software or a device.
- Plan an appropriate backup, migration and test of the features you actually use. Some old data needs additional conversion or recovery work, which must be assessed first.
- Help users settle into the agreed application and review account security.
Explore our Cloud and Microsoft 365 support, home remote support or business remote support. For account protection, see passwords, MFA and passkeys explained. Our Outlook sharing-link troubleshooting article is an example of why the exact application and version matter.
Please do not include passwords or recovery codes in your enquiry. We will agree the support scope and any data-handling steps before making changes.
