Posted in: Technology

How to Fix Outlook 2016 Not Sending Mails?

In today’s digital age, a smoothly functioning email system is crucial for both personal and professional communication. When Outlook 2016 refuses to send emails it can cause significant disruptions. Let’s delve into the reasons behind this issue and explore effective solutions.

Are you frustrated with your Outlook 2016 email client refusing to send emails? You’re not alone. Many users encounter this issue, and fortunately, resolving it is often a matter of understanding the common causes and taking the right steps. In this comprehensive guide, we’ll walk you through troubleshooting methods, preventive measures, and even share some real success stories to inspire confidence.

In the fast-paced digital world, a glitch in your email system can cause significant disruptions. Outlook 2016 users have reported issues with sending emails, leading to the need for quick and effective solutions. Let’s dive into the details of why this problem occurs and how you can fix it.

Understanding the Issue

Users experiencing problems with Outlook 2016 not sending emails often find themselves in a perplexing situation. The inability to send emails can hinder productivity and cause misunderstandings. Before diving into solutions, it’s essential to understand the root causes of this issue.

Troubleshooting Basics

The first step in resolving any Outlook problem is to perform basic troubleshooting. Check your internet connectivity, ensuring a stable connection. Verify the status of the email servers to rule out any temporary outages affecting your email sending capability.

Authentication Issues

Outlook relies on correct authentication for seamless email sending. Ensure that your login credentials are accurate, avoiding common typos. This simple step can often be the key to resolving sending problems.

Outlook Configuration

Misconfigurations in Outlook settings can lead to email sending failures. Walk through the configuration settings step by step, ensuring everything is set up correctly for sending emails.

Firewall and Antivirus Settings

Security software, such as firewalls and antivirus programs, can sometimes interfere with Outlook’s functionality. Adjusting the settings to allow Outlook to communicate freely can resolve sending issues.

SMTP Server Settings

The Simple Mail Transfer Protocol (SMTP) server is crucial for sending emails. Confirm that your Outlook is configured with the correct SMTP server details, and update them if necessary.

Updating Outlook

Using an outdated version of Outlook might be the cause of your email sending woes. Check for updates and ensure you are running the latest version of the software.

Checking for Software Conflicts

Third-party applications on your computer can conflict with Outlook. Identify and resolve these conflicts to ensure smooth email sending.

Storage Limitations

The size of your mailbox can impact email sending. Manage your mailbox size effectively to avoid issues with sending emails.

ISP Restrictions

Internet Service Providers (ISPs) can impose restrictions on email sending. Understand and overcome these restrictions for reliable email delivery.

Alternative Sending Methods

If Outlook continues to be uncooperative, explore alternative methods for sending emails. Consider using web-based email solutions as a temporary workaround.

Professional Support

When all else fails, seek assistance from IT professionals. They can diagnose and resolve complex issues that may be beyond your expertise.

Preventive Measures

To avoid future Outlook sending problems, adopt preventive measures. Regularly check and update your settings, and implement maintenance practices to ensure a trouble-free email experience.

Common Causes of Outlook 2016 Not Sending Mails

A. Incorrect Email Settings

One of the primary reasons for email delivery failure is incorrect email configuration. Ensure your Outlook settings align with the recommended configuration for your email provider.

B. Connectivity Issues

A stable internet connection is vital for sending emails. We’ll explore how to verify your connection and troubleshoot any disruptions.

C. Outdated Outlook Version

Using an outdated version of Outlook might be the culprit. Discover how to update your software effortlessly.

D. Firewall or Antivirus Interference

Firewall or antivirus programs, though essential for security, can sometimes interfere with your outgoing emails. Learn how to identify and address these issues.

Troubleshooting Steps

A. Verify Internet Connection

Before delving into Outlook settings, it’s crucial to ensure your internet connection is stable. We’ll guide you through the steps.

B. Check Email Account Settings

A misconfiguration in your email settings can prevent successful email sending. Learn how to double-check and rectify these settings.

C. Update Outlook to the Latest Version

Keeping your software updated is a simple yet effective solution. We’ll guide you on updating Outlook to the latest version hassle-free.

D. Disable Firewall and Antivirus Temporarily

Temporarily disabling your firewall and antivirus can help identify if they are causing the sending issues. We’ll guide you on how to do this safely.


Fixing Outlook 2016 not sending emails is a manageable task with the right approach. By following the outlined steps, you can troubleshoot and resolve the issue, restoring your email communication to its full functionality.

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