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Written By Rohan Wiese
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Updated on July 4th, 2025
Email attachments can occupy a substantial amount of space in Outlook. Over time, this not only slows down Outlook’s performance but also hits storage limits. Here are the key reasons why you should delete large attachments in Outlook:
To help you fix Outlook mailbox issues more efficiently, here are some proven methods you can use to delete attachments from multiple Outlook messages at once. Further, we’ll introduce the available techniques to simplify the task.
The Aryson PST Compress Tool is an advanced utility that enables you to remove attachments from multiple Outlook emails with ease and automation. If you’re dealing with oversized PST files or want to declutter your mailbox, this tool offers innovative compression modes. These options allow you to remove, compress, or extract attachments without affecting the actual email content. It supports both ANSI and UNICODE PST files and works with all major Outlook versions, including 2019, 2016, and 2013. With features such as date-based filtering, batch processing, and the ability to run without Outlook installed, it can manage bulk Outlook data quickly and efficiently.






Once deleted, it will reduce the Outlook Mailbox size without deleting emails. Now, you’ll receive a detailed log/report of the actions taken.
Outlook offers several built-in options. Although these methods are helpful for small-scale cleanups, they can be time-consuming when dealing with hundreds or thousands of emails. Below are two practical manual approaches you can try:
Note: This method only removes the attachment from the selected email. If you have several emails with attachments, you’ll need to repeat the same steps for each one.
If you’re familiar with Outlook’s Developer tools and want a free way to automate attachment removal, using a VBA (Visual Basic for Applications) script is a helpful option. However, it does require basic scripting knowledge and access to the Outlook desktop app with macros enabled.

Additional Tips: Always create a backup of your PST/OST file before running any scripts. So, you can recover your data if something goes wrong.
Even after an email has been sent or received, Outlook still gives you the option to remove attachments manually. However, it’s essential to note that this method only works one email at a time, and Outlook does not support the manual bulk deletion of attachments.
In many cases, Outlook displays attachments in a line just below the subject line. It is commonly referred to as the email header section. Here’s how to remove them:
Before choosing the manual method to remove attachments, it’s essential to understand its limitations.
If you’re dealing with thousands of emails, manually removing attachments can be a time-consuming and inefficient process.
Now, you know the easiest way to remove attachments from multiple Outlook emails using the Aryson PST Compress Tool. This tool is automated, easy to use, and allows for the removal of attachments in bulk with helpful filters. Also, we explained manual methods and a VBA script for those who are comfortable with technical options. However, these methods can be time-consuming and don’t support bulk removal. So, if you want a quick and safe way to clean up Outlook attachments, the automated tool is the best option.
Ans: No, Outlook does not provide a built-in option to remove attachments from multiple emails simultaneously. To do so, you can use the Aryson PST Compress Tool for bulk removal.
Ans: No, removing an attachment only deletes the file that is attached. The email body, subject, sender details, and other metadata remain intact.
Ans: Some tools, like Aryson PST Compress Tool, work independently and do not require Outlook to be installed. However, always check tool requirements before starting.
Ans: Outlook’s manual method does not support filters. However, professional tools offer advanced filtering options that allow you to remove attachments based on date range, file size, sender, or subject.
About The Author:
Rohan Wiese is a Technical Writer at Aryson Technologies. He is an expert Email Forensic, Cloud Computing, and a passionate nerd with over 10 years of experience in technical content writing. He writes about Cloud Migration, Database Recovery, Email Backup, Windows, Mac, and Tech.
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