Best Way to Reduce Zoho Mail Mailbox Size: Complete Guide

Published On

February 10th, 2026

Reading Time

6 Minutes Reading

Zoho Mail users use it daily for office work, sharing files, and more. Over time, email messages and other data keep adding up and your mailbox becomes full. When this happens, you will face issues like slow loading, not getting new mails, and more.

Most of the Zoho Mail users think deleting emails is the only option left to get rid of this issue. But what if about if all of the emails are very important and you cannot afford to lose them. In this case, the best and reliable option is compressing Zoho emails without deleting useful emails. It will help you to reduce Zoho Mail mailbox size.

In this blog, we are going to explain how to reduce Zoho Mail mailbox size. So if you are one of them facing Zoho Mail storage issue, this blog will be very helpful for you.

Common Issues Faced by Users When Zoho Mailbox Become Full

When your Zoho Mail mailbox size increases or gets full, it will not only give you warning messages, but you will face the several issues like:

Emails Stop Coming In: You will start losing your important emails related to your work which directly affects communication and productivity.
Unable to Send Emails: Once your Zoho Mail storage is full, you will not be able to sent emails. This can become a very serious issue especially for business users.
Slow Mailbox Performance: A heavy mailbox can easily make your Zoho Mailbox very slow. It will take long time to open, search, and send emails.
Attachments Issues: Users often fail to download or forward emails containing large attachments because of a full mailbox storage issue.
Warning Messages: Your Zoho Mail account starts continuous slowing storage full warnings. These repetitive alerts can very annoying and stressful.

What Are the Best Ways to Reduce Zoho Mail Mailbox Size

Below are some easy and common ways to reduce Zoho mailbox size.

Check What is Taking A Lot of Space

Before doing anything, it is important to check what is taking a lot of space in your Zoho mailbox. Mostly, the issue is:

Email messages containing heavy attachments
Repeated files sent again and again in emails
Old emails stored for a long time and no longer needed

Once this is clear, reducing Zoho Mail mailbox size becomes very easier.

Clean Up Unnecessary Email Files

Many email messages are not so important and taking space like:

Promotional emails
Auto-generated notifications
Old conversations
Sent mailbox

Removing these email messages helps in freeing up Zoho Mail storage space.

Clear Deleted Emails Permanently

Deleting emails from Zoho mailbox is not enough.
Emails stored in the Trash folder and spam folders still use space.

Best Practice: Please make a habit of regularly empty the trash and spam folder to release some space.

Download Attachments and Remove Them from Zoho Emails

Attachments are one of the most common reasons behind large mailbox size.

What you can do:

Download attachments from Zoho Mail emails to your computer
Delete attachments from Zoho Mail emails
Keep the email text for future reference

This method is very useful but can be very time-consuming if there is a large number of emails containing attachments.

Organize Your Emails to Avoid Storage Issue

Users can easily reduce future storage issues in Zoho mailbox by:

Creating folders for the specific email messages
Using rules to manage the incoming attachments
Avoiding the unwanted file sharing through email

This method is helpful in keeping the Zoho Mail mailbox organized over time.

Best and Recommended Way: 4n6 Zoho Mail Compressor

All of the methods mentioned above require manual efforts and consume a lot of time. For users who need a quick, safe, and reliable method, 4n6 Email Compress Software is here. With this advanced software, you can easily compress Zoho Mail emails without deleting them and reduce Zoho Mail mailbox size safely.

This software is very helpful to:

Compress Zoho email files while keeping original content and structure.
Remove unwanted attachments from Zoho Mail without deleting the email itself.
It can automatically zip all attachments and reattach them to the same email.
Helpful to compress inline images embedded in Zoho Mail email messages.
You can easily extract and save attachments to any separate folder to reduce Zoho Mail mailbox size.
Supports to compress Zoho Mail emails in bulk to save precious time and reduce efforts.
Comes up with the very simple user interface and supported by all the versions of Windows.

Free demo version is available to test the software features and working without investing anything. So, download the free version now and start compressing Zoho Mail emails.

Step-by-Step Method to Reduce Zoho Mail Mailbox Size by Compressing Not Deleting

Once the application is downloaded, you will get instructions to install it. After that, run the program and click the Open button.
Now, you will get a drop-down menu, choose the Email Accounts option from the options available.
Click the Add Account option is Zoho Mail and enter the correct login details of your Zoho Mail account. Next, click the Add button.
Once you click Add, the app starts analyzing and loading your Zoho Mailboxes on the left panel. You can preview them before compressing.
Now, click the Compress and Save button and choose the required saving option.
Check mailboxes loaded on the left panel, option to compress emails, and click the Save button.

The software starts compressing Zoho Mail emails. This process will take only some moments.

Why This Method is Best?

Instead of deleting your Zoho emails or removing attachments manually, the software allows to reduce Zoho Mail mailbox size while keeping all emails intact. It is the best solution for individuals and business users. Anyone who facing such issue can use this program as it supports:

And more.

Conclusion

In today’s content, we have covered the most common topic of how to reduce Zoho Mail mailbox size. Here, we have explained the most popular and best ways to reduce Zoho Mailboxes size. It’s completely up to you which method you would like to prefer.

All the methods are tried and tested.