I have been using Microsoft Outlook since the first version. Its the main desktop mail app that has dominated the Windows platform for a long time. I have used or tried a lot of other apps (Eudora, Thunderbird, MS Mail, MS Live Mail, eMClient etc). I loved Eudora when it first implemented. Powerful and easily transferred to new PC. Thunderbird is similar and is supported by many new Gmail and MS Auth 2.0. I normally install Thunderbird for clients that don’t have a MS 365 or Business Office account. Issue it it does not have the sync of email/contacts/calendar that a true Microsoft account has (Outlook.com to full 365 account). For me I live in classic Outlook. I dedicate a 32″ monitor just for it. Its the most MS app I use on a daily basis for all MS apps. Millions of people who use MS 365 and even POP and IMAP use classic Outlook. And millions of people (I can’t be the only one) that love the classic Outlook and DETEST!!!!!! the New Outlook. Look at the AI Brave search result on NEW Outlook detest:
I understand your frustration with the new Outlook for Windows. Many users share your sentiment, describing the app as poorly designed, slow, and unreliable. The new Outlook is a web-based application that doesn’t integrate well with the Windows operating system, making it feel more like a browser tab than a native app.
It lacks the seamless integration and performance of the previous Mail & Calendar app, which was lightweight and fast.
Users report significant issues with responsiveness, often experiencing a noticeable delay—up to half a second—between clicking an item and seeing the result.
The app is also resource-heavy, consuming around 373MB to 1GB of RAM, compared to the old Mail app’s 100MB, which contributes to its sluggish performance.
The loading time is also criticized, with users forced to wait for a splash screen for over a second before accessing their inbox.
Another major complaint is the app’s handling of notifications. Push notifications are inconsistent, sometimes delayed, and often arrive after the older Mail app has already alerted the user.
Clicking a notification can lead to a frustrating experience, where the app takes several seconds to open and may display the general inbox instead of the specific email, or even open the same email in two separate windows.
The user interface is frequently described as confusing and poorly designed. Features like a unified inbox for multiple accounts are missing, forcing users to switch between different views to see all their emails.
The layout, especially in dark mode, is criticized as poor, and the app is said to fail to open documents, lose emails, and incorrectly rename attachments.
Furthermore, the new Outlook breaks compatibility with many traditional add-ins, such as spam filters and project management tools, which are essential for many users.
Some users have even reported that the app fails to send emails, doesn’t sync correctly, and doesn’t mark emails as read even when they have been viewed.
The app is also criticized for displaying unwanted documents during attachment attempts and for presenting search results that are inaccurate or irrelevant.
Despite being labeled as a “preview,” Microsoft has been pushing the new Outlook to users by automatically pinning it to the Start menu and encouraging users to switch from the older Mail & Calendar app.
This has led to widespread dissatisfaction, with users demanding the return of the old Mail app, which they find superior in speed, design, and reliability.
Some users have even resorted to using registry edits to disable the new Outlook toggle to prevent it from appearing.
In summary, the new Outlook is widely regarded as a step backward in functionality and performance, with users expressing strong dislike for its design, speed, reliability, and overall user experience.
There are a ton of features that New Outlook does not have compared to classic Outlook. I live in Shortcut view. I maintain 4 email accounts and need new emails display. I also need calendar view options such that I can easily change from standard view of everything to only things I need to bill for clients. I have Groups of Contacts and a group of invoices I use. New Outlook will likely NEVER have these options. I Can easily do this with classic and New Outlook does not and possible never have this options. I have a Hyper-V of Windows with MS 365 clients that I can easily switch Outlook profiles to test emails. New Outlook will NEVER have this option. I can easily transfer .PST files from one PC to a new PC. NEW Outlook will NEVER have this option. I have a client that has 3 emails setup in NEW Outlook with POP accounts and I can’t transfer to a new PC because there is no option for this. The only thing I can export is contacts. This drives me CRAZY!! I can go on and on why Microsoft should NEVER abandon classic Outlook. They say 2029 is possible stop support classic Outlook. If this happens people need to revolt and stop Microsoft from doing this. They make a great app that links into Exchange perfectly with email/Contacts/Calendar and flows great between multiple PC/Laptops and they are going to abandon will drive me crazy!!
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