Max Email Size in cPanel

How to Change the Max Email Size in cPanel: A Complete Guide

If you are managing email services on a hosting platform like cPanel, understanding how to configure the max email size in cPanel is crucial, mainly for all those businesses that are dealing with huge attachments. Even if you’re running on a dedicated server, cloud hosting, or even a GPU server, managing email limits well helps maintain blazing-fast performance and guarantees seamless email delivery.

In this knowledge base, we’ll tell you step-by-step how to make changes in the max email size in cPanel, check out why it really matters, and give you required tips even if you’re hosting with Infinitive Host, utilizing a GPU dedicated server, or handling any cutting-edge web hosting environment.

What is the Max Email Size in cPanel?

The max email size in cPanel basically refers to the maximum size (along with attachments) that an email can be when sent or received with the help of your mail server. It shows impacts on:

• Email deliverability
• Attachment management
• Server load and storage utilization

The fixed size limit is generally around 50 MB, but various service providers or administrators adjust this according to particular demands or server capabilities, mainly on personalized setups such as a GPU server or a dedicated server.

Why Change Max Email Size in cPanel?

Here are some general reasons to improve the max email size in cPanel:

• You want to send high-quality images, CAD files, or huge reports.
• Clients generally utilize email to send large attachments.
• Hosting applications such as CRMs, ERPs (including Odoo or Vtiger), or AI-powered systems produce complex reports or logs.
• You are utilizing a robust infrastructure, like a GPU dedicated server, which can manage more load.

How to Check the Present Max Email Size in cPanel

Before you make changes, it’s necessary to know the present setup. Here’s how to check it:

1. Firstly, log in to cPanel.
2. Go to Email > Email Accounts.
3. Select the particular account.
4. Check all the limitations, if any, for that specific user or globally with the help of Exim Configuration Manager in WHM (if utilizing root access).

If you are hosted on Infinitive Host, they may offer personalized settings according to your hosting plan, mainly for GPU hosting clients.

How to Change Max Email Size in cPanel via WHM (WebHost Manager)

If you have admin control (common with dedicated server, GPU server, or windows cloud VPS solutions), here’s how to improve the max email size in cPanel with the help of WHM:

Step-by-Step:

1. Log in to WHM via root details.
2. Go to:

Home » Service Configuration » Exim Configuration Manager

3. Go to the Advanced Editor.
4. Look for this directive:

message_size_limit

5. Set the value (in bytes). For instance:

• 50 MB = 52428800
• 100 MB = 104857600

6. Save & restart Exim.

This will easily change the max email size in cPanel server-wide.

Note: On systems such as a GPU dedicated server, this setup can be enhanced even further thanks to improved processing proficiencies.

Change Max Email Size in cPanel via Exim Configuration File (For Advanced Users)

If you’re on a completely managed dedicated server or have terminal access, you can easily edit the Exim configuration file manually.

Steps:

1. SSH into your chosen server as root.
2. Open the Exim setup file:

nano /etc/exim/exim.conf

3. Find or include this line:

service exim restart

4. Save all valid changes and restart Exim:

service exim restart

Warning: Manual changes may be cancelled by WHM updates. Always utilize WHM’s state-of-the-art editor if possible.

Alternative: Contact Your Hosting Service Provider

If you are utilizing a shared hosting solution or don’t have root access:

• Contact your web hosting service provider’s support team (for example, Infinitive Host).
• Request them to increase the max email size in cPanel.
• Justify (for example, “want to send AI-generated reports as attachments”).

Infinitive Host provides scalable setups even on GPU hosting and cloud hosting environments, which makes this type of change quick and successful.

Best Practices for Increasing Email Size Limits

Even if you are hosting on a standard dedicated server or a robust GPU server, follow all these tips mentioned below:

Don’t Go Overboard

Try to avoid setting the max email size in cPanel to a very high value unless important—it can lead to email delays and storage flooding.

Synchronize Limits

Make sure the following also meets your changed settings:

• PHP mail limits
• Webmail settings
• Mail client setups (such as Thunderbird or Outlook)

Block Large Spam Files

Utilize SpamAssassin or a similar type of tool to block spam emails with huge, doubtful attachments.

Encourage File Sharing Services

For very huge files, utilize Google Drive or Dropbox instead, mainly if you are handling resources on a GPU dedicated server where performance is on top.

Use Case: AI Tasks on a GPU Server

Think about how you are an AI startup using a GPU server hosted by Infinitive Host. Your models produce high-quality AI image generator results that demand to be shared with clients in the help of email. By adjusting the max email size in cPanel, you can easily

• Attach many large result files.
• Maintain high-quality delivery.
• Prevent broken or rejected emails just because of the attachment size.

This situation outlines the scalability and control you get when handling your infrastructure via Infinitive Host on a GPU dedicated server.

Related Questions

Q: What’s the right email size to set?

25–50MB is standard. Anything that is more than 100 MB should be backed by robust hardware, such as a dedicated server hosting.

Q: Will increasing email size impact performance?

In the case of shared hosting, yes. But with cloud hosting or GPU hosting, the performance impact is much less if properly configured.

Q: Can I limit the maximum email size for particular users?

Yes, with the help of cPanel > Email Accounts > Manage. Set mailbox quotas and size limits one at a time.

Conclusion

Swapping the max email size in cPanel is a fully practical task that improves email working for high-demand environments. If you’re using shared hosting, cloud hosting, or a GPU server, knowing how to control email limits is very important for managing tasks successfully.

If you are going for Infinitive Host, you can rest assured that your demanded infrastructure can support huge emails, mainly when powered by a GPU dedicated server.

So until the next time you hit a specific size error, don’t worry—changing your settings, improving your flow, and let your server manage all the heavy lifting.