Outlook 365 Delay Delivery Not Working Fix: Easy Solutions

Encounter problems with Outlook 365 delay delivery? Unravel the reasons behind this issue and learn how to fix Outlook 365 delay delivery not working with our comprehensive guide. There is also a recommended Outlook mailbox auto-backup solution to avoid data loss problems.


by Sebastian Published on April 15, 2024

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In our fast-paced digital world, email communication is the cornerstone of both professional and personal exchanges. Outlook 365 stands out with its array of features designed to streamline email management, including the handy option to delay message delivery. Yet, even the most reliable tools can falter at times, leaving users frustrated when this feature malfunctions. It's imperative to grasp the root causes behind Outlook 365 delayed delivery not working to restore seamless email functionality. This comprehensive guide will explore the typical culprits behind this issue and offer practical remedies to resolve it swiftly and effectively.

Understanding the Issue of Delayed Delivery Not Working

Outlook 365 stands as a stalwart in this realm with its myriad features aimed at enhancing productivity. One such feature is the ability to delay message delivery, which allows users to schedule emails to be sent at a later time. However, despite its usefulness, users may encounter instances where this feature fails to function as expected. Understanding the underlying reasons behind Outlook's delayed delivery issues is crucial for troubleshooting and restoring seamless email operations.

Potential Reasons for This Issue:

Server Issues: Problems with the email server infrastructure, such as downtime or maintenance, can disrupt the delayed delivery functionality.
Internet Connectivity: Poor or unstable internet connection can prevent Outlook from accessing the necessary resources to send emails on schedule.
Outlook Settings: Incorrect or misconfigured settings within the Outlook application itself may interfere with the delayed delivery feature.|
Software Bugs: Like any software, Outlook is susceptible to bugs and glitches that can affect its performance, including the delayed delivery function.
Conflicting Add-ons: Third-party add-ons or plugins installed in Outlook may conflict with its core functionality, leading to issues with delayed delivery.
Firewall or Antivirus Settings: Overly aggressive firewall or antivirus settings on the user's computer can block outgoing emails, causing delays in delivery.

Understanding these potential causes is the first step towards resolving Outlook's delayed delivery issues and ensuring smooth email operations. In the following sections, we'll explore step-by-step solutions to address each of these underlying issues and restore the functionality of the delayed delivery feature in Outlook 365.

Fix the Problem Outlook Delayed Delivery Not Working

Now that we've identified the potential reasons behind Outlook's delayed delivery issues, let's delve into actionable solutions to address them effectively. Below are step-by-step methods to fix the problem and restore the functionality of delayed delivery in Outlook:

Verify Internet Connectivity

To ensure smooth email operations, verify that your internet connection is stable and functioning properly. You can do this by accessing other websites or online services to confirm internet connectivity. If you encounter any issues, troubleshoot your internet connection by restarting your router, checking network cables, or contacting your internet service provider for assistance. Once you have a stable internet connection, try sending emails with delayed delivery again to see if the issue persists.

Internet Connectivity

1. Opening a web browser and accessing a few different websites.

2. If you encounter any issues loading websites or experience slow internet speeds, troubleshoot your internet connection.

3. Restart your router by unplugging it from the power source, waiting for a few minutes, and then plugging it back in.

4. Check network cables to ensure they are securely connected to your router and computer.

5. Once you have a stable internet connection, try sending emails with delayed delivery again to see if the problem is resolved.

Update Outlook to the Latest Version

it's also essential to ensure that you're using the most up-to-date version of Outlook. Updating Outlook not only guarantees compatibility with the latest features and fixes but also enhances overall performance and stability.

However, it's important to note that the updating process may require some time, and users may need to temporarily pause their workflow while Outlook restarts.

Update Version

Access Outlook: Start by opening the Outlook application on your computer.

Go to File: Locate and click on the "File" tab positioned in the top-left corner of the Outlook window.

Check for Updates: From the menu on the left, choose "Office Account," then click on "Update Options," and select "Update Now" to search for and install any available updates.

Follow Installation Steps: If updates are detected, adhere to the prompts displayed on-screen to download and install them.

Restart Outlook: After the updates have been installed, restart Outlook to ensure that the changes take effect.

3. Verify Delay Delivery Settings

It's essential to consider the possibility that you might have inadvertently disabled or turned off the feature earlier. If this is the case, attempting other solutions may prove futile and result in wasted time and effort.

1. locate the Options tab.

2. If the Delay Delivery option didn't function as expected for a specific email, locate the email in the Outbox folder.

3. Open the email by double-clicking on it in the Outbox folder to access the Compose window.

4. Switch to the Options tab within the Compose window and click Delay Delivery.

5. Verify if the Do not deliver before setting is configured correctly.

6. If the time or date is incorrect, adjust it accordingly.

Bonus: All-in-One Outlook Auto-Backup and Cleanup Solution

We've already mentioned three ways to fix Outlook delayed delivery not working, but you might also want a pro tool to back up your Outlook mailbox. If you're searching for software to automatically back up and tidy your emails to avoid future mailbox troubles, AOMEI backup professional is a top pick. It ensures strong Outlook backup features, letting you securely back up your emails. You can log into multiple Outlook accounts, like AOL, and set up automatic backups and cleanups. Plus, it offers different backup choices such as full, incremental backup, and differential backup, so you can back up what you need.

✍ With its user-friendly design, it makes backing up simple and easy to understand.
✍ Besides saving emails, it offers many other backup choices like system backup, disk backup, file backup, partition backup, and cloud backup.
✍ It works with lots of different devices like hard drives, USB sticks, and memory cards, giving you lots of options.
✍ It works smoothly on all types of Windows, from the newest to older versions, so you won't have any trouble using it.

Try AOMEI Backupper now and see how it can quickly protect your Outlook data.

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1. Start by logging into your Outlook account, then open AOMEI Backupper and go to the Backup section. Choose Outlook Backup.

Outlook Backup

2. Select Add Outlook and pick the email account and mailbox you want to back up. Click OK to confirm.

Add Gmail

3. Choose where you want to save your Outlook backup files.

Select Destination

4. Set up a schedule for your backups by turning on Schedule Backup. Choose how often you want to back up your emails, like Daily, Weekly, Monthly, or when certain events happen. Click Start Backup when you're ready.

Schedule Backup

Tips: For easy cleaning of Mail backups, try the backup backup scheme. It gives you three backup modes and four auto-cleanup choices, like daily, weekly, or monthly, so you can manage your storage space better.

FAQs on Adding Work Mails to Outlook

Q1: Why is my Outlook 365 delay delivery not working?

A: Outlook delay delivery may not work due to network issues, outdated software, incorrect settings, antivirus/firewall interference, or server outages.

Q2: How do I fix delayed delivery in Outlook 365?

A: To fix delay delivery issues, ensure a stable internet connection, update Outlook to the latest version, review email settings, disable antivirus/firewall temporarily, and check for server outages.

Q3: Can antivirus software affect Outlook delay delivery?

A: Yes, antivirus software with aggressive email scanning features may interfere with Outlook delay delivery. Temporarily disable antivirus protection and test the feature again.

Q4: Does Outlook delay delivery work during server outages?

A: No, Outlook delay delivery relies on server connectivity. If there are server outages or maintenance activities, delayed delivery may not function until service is restored.

Q5: How can I check for Outlook 365 service status?

A: You can check the status of Outlook 365 services by visiting the Microsoft Service Status page and looking for any reported issues or disruptions.


In conclusion, troubleshooting Outlook 365 delay delivery issues requires a systematic approach to identify and address underlying causes. By following the methods outlined in this guide, users can effectively resolve delay delivery problems and ensure smooth email operations. Remember to stay updated on software versions, review configuration settings, and monitor for any network or server-related issues. With these solutions at your disposal, you can overcome Outlook 365 delay delivery not working issues with ease. If you're seeking a solution for automatically saving Outlook emails to hard drives, consider utilizing AOMEI Backupper. It offers the perfect solution for this requirement.

Sebastian · Editor
Sebastian, a professional editor at AOMEI, brings personal product experience and a user-focused mindset to solve data protection issues. With valuable technical insights and a dedication to user experience, he simplifies complex concepts and provides reliable solutions. Sebastian's expertise and skills make him an invaluable resource for readers seeking technical guidance.