How to Send Large Files through Outlook

When trying to send large files through Outlook,  you’ll likely see an error if you’re attaching a file larger than the maximum size limit.

The error message will show “Attachment size exceeds the allowable limit” or “The file you’re attaching is bigger than the server allows. Try putting the file in a shared location and sending a link instead,” depending on the Outlook version you’re using.

This is because Outlook imposes a file size limit to prevent large files from taking up too much space in the recipient’s inbox.

What is the Outlook attachment size limit?

Sadly, due to mail server restrictions, the default max attachment size limit of files attached in Outlook is 20 megabytes (MB). This attachment limit applies to both Outlook and Office 365 versions of Outlook.

This Outlook attachment size limit makes it difficult to be productive — especially in the workplace because you’ll need to use a separate file transfer solution to deliver large files to your contacts. You might even need to bother your IT team for help. (Trust me, your IT team hates dealing with issues like this.)

If you want to solve this issue yourself, the internet lists many possible solutions to this problem:

  • Uploading files via OneDrive and sharing the link
  • Modifying the registry on a Windows computer to increase the upload size limit
  • Compressing files before sending
  • Breaking up a file into chunks and sending multiple emails

While the above solutions will help you solve your problem, they’re inconvenient and require a lot of time just to send one file! You should be able to comfortably send large files directly from within Outlook. You should also be able to protect the files you share.

This is where TitanFile helps.

How to send large files through Outlook

TitanFile’s Secure Send add-in for Outlook is the solution that will enable you to easily bypass Outlook’s file size limit and send large files in all versions of Outlook and Office 365.

In addition to being able to attach large files in Outlook, TitanFile also encrypts emails to ensure that no unauthorized persons or parties have access to any confidential data.

Here’s how to start sending big files in Outlook in just 5 minutes:

1) Sign up for a free trial of TitanFile. (Don’t worry, no credit card is required)

2) Download the Secure Send add-in here and follow the installation instructions. With the add-in installed, you’ll see two new icons on Outlook’s navigation ribbon: “Attach Large File” and “Secure Send” as shown in the image below.

send large files in outlook

3 ) Add a contact, subject line, and message like you normally would.

4) Click the “Attach Large File” button to attach a file larger than 25MB, then wait for the file to finish uploading. You won’t have to wait long because TitanFile’s blazing-fast upload speed is capable of uploading gigabytes worth of files within minutes! (as long as your internet speed supports it)

send large files in outlook

5) Click the “secure send” icon to send an encrypted Outlook or Office 365 email to your recipient.

send large files in outlook

That’s it! Your recipient will now receive a link to access the files securely.

Now you can securely send large files to all your contacts, directly from Outlook. No need to resort to any other large file-sharing method or worry about email file size limits again.

Found this solution useful? Share it below to show others how to attach large files to Outlook.