Blogs
on November 6, 2025
If you manually type in the secondary connected account email address in the "From" field, the email is sent as "On behalf of" your primary Outlook.com account. This occurs because custom form script is now disabled by default. Explore strategies to manage client expectations and share your own experiences. Explore how to maintain control while using agile methods in project management. Share your strategies and learn from others' experiences in achieving this balance. Learn six ways to foster a culture of data-driven decision making with business process automation (BPA) in this informative and conversational article.
You can mitigate this higher cost by using Appointment Recurrence settings to set an end time or maximum recurrence count. Then, you can create a new recurring meeting instead of extending the existing recurrence. To reduce the number of items that are stored locally, limit the synchronization window that's used for shared folders. To fix performance issues that affect shared folders, try the following method. To fix performance issues that affect your Calendar, Mail, or shared folders, use the following resolutions, as appropriate. The built-in back-off mechanisms in the indexing component of Windows Search or WDS pauses the indexing of Outlook data when the system is under heavy use.
While we fix the problem, you can send the file as a OneDrive link. Find solutions to common problems or get help from a support agent. Use the classic Outlook for Windows connectivity troubleshooter to troubleshoot Outlook connectivity issues.
However, you might experience decreased performance as the number of items approaches 10,000 calendar items, 10,000 folders, or 100,000 mail items per folder. Large numbers of recurring meetings or long-lived recurring meetings can also have an exaggerated effect on performance. One-time meetings have a relatively small effect, and long-lived, recurring meetings have a greater effect. A change that's made in an instance of a recurring meeting creates exceptions that are stored in the recurring meeting series. Every change to the meeting attributes, such as the subject, body, location, or time, creates a corresponding exception. Eventually, these exceptions inflate the size of the recurring meeting and impose https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html a greater performance cost.
Give Outlook a few minutes to finish the process and it should start to work again. If Outlook is NOT able to start in safe mode, then try the next proposed solution below, entitled Create a new Outlook profile. Use the classic Outlook startup troubleshooter to diagnose and fix several common classic Outlook for https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html Windows issues for you. The navigation pane, which typically displays your Inbox, Sent Items, and other folders on the left sidebar, can sometimes become corrupted.
Creating a new Outlook profile may resolve some performance issues. MDaemon Technologies is a pioneer in developing email and email security software helping to protect customers from evolving cyber-security threats. Its products and services are trusted by thousands of organizations in over 140 countries. For more than two decades, the company’s products have been developed with the ongoing input of IT professionals who demand reliable, affordable software that requires minimal effort to manage.
One reason Outlook fails to launch is that you’ve installed faulty add-ins in the app. These add-ins may be working incorrectly, causing the app not to launch. It's not uncommon, and you can easily make Microsoft's email and calendar app open with a few simple fixes. We’ll show you what to do on your Windows 11 or Windows 10 PC.
Or, you can disable any antivirus software add-ins that are installed in Outlook. Be aware that if you are connecting to an Exchange Server mailbox, your mailbox or your email messages are already being scanned by antivirus software on the server. Optionally, if you have a Microsoft Exchange online archive, you can move items to that archive or create retention policies to automatically dispose of older items. For more information, see You may experience application pauses if you have a large Outlook data file. These issues might occur if a mailbox contains https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html lots of folders or there are lots of items in any one folder. There's no hard limit to how many folders a mailbox can contain or how many items a folder can contain.
Use the classic Outlook startup troubleshooter to diagnose and fix several common classic Outlook for Windows issues for https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html you. Follow the on-screen instructions to update your Office apps. Then, launch your Outlook app, and it should open without problems. Now, launch Outlook 2016 again and check if the issue persists or not, and if it does, you may follow up with other workarounds given below.
A speedy email client keeps you on the pulse, allowing you to respond promptly and stay ahead of the game. The need to speed up Outlook isn’t just about shaving a few seconds off your email routine. It’s about reclaiming your time, enhancing your efficiency, and navigating the professional landscape with agility. So before we answer How to improve Outlook speed, let’s figure out why bother with the whole ‘speeding up Outlook’ gig in the first place.