In many cases, the email timeout (socket error) issue is caused by your email application timing out before the attachment has finished uploading to the mail server. Fortunately, it can often be resolved by increasing your email client’s server timeout setting.
This guide will help you resolve timeout (Socket Error) messages that occur when sending emails with large attachments using your email application.
By following the steps below, you can continue sending larger attachments with greater reliability while avoiding unnecessary support requests.
What This Means
A timeout (sometimes displayed as a Socket Error) occurs when your email application stops waiting for the mail server to respond before the email has finished uploading.
This is most common when:
- Sending large attachments
- Uploading files over a slower internet connection
- Using an email application with a low server timeout value
Increasing the timeout allows your email application more time to complete the upload before cancelling the connection.
Steps to Fix the Email Timeout (Socket Error)
Step 1: Confirm the attachment size
Before changing any settings:
- Check the size of the attachment.
- If the file is unusually large, consider compressing it into a ZIP file or sharing it through a cloud storage service instead.
Large attachments naturally take longer to upload.
Step 2: Open your email application’s account settings
Open your preferred email application.
Depending on the application, navigate to areas such as:
- Tools
- Options
- Account Settings
- Mail Settings
- Advanced Settings
The exact location varies between email applications.
Step 3: Locate the server timeout setting
Look for a setting labelled:
- Server Timeout
- Connection Timeout
- Mail Server Timeout
TIP: This setting determines how long your email application waits before ending the connection.
Step 4: Increase the timeout value
Increase the timeout to at least 15 minutes.
If your email client provides a slider, move it towards the maximum available value.
Save the changes once complete.
Step 5: Send the email again
Retry sending your email with the attachment.
If the message sends successfully, the timeout setting was likely the cause of the issue.
Step 6: If the problem continues
If increasing the timeout does not resolve the problem:
- Verify that your internet connection is stable.
- Check that the attachment is not larger than your email service’s permitted attachment limit.
- Restart your email application and try again.
Important Things to Know
- Increasing the timeout does not increase the maximum attachment size.
- Different email applications store timeout settings in different locations.
- Slow internet connections may still require additional upload time.
- Some email providers enforce attachment size limits regardless of timeout settings.
Before You Move On
Before continuing, confirm that:
- Your timeout setting has been saved.
- Your internet connection is stable.
- Your attachment size is within your email provider’s allowed limits.
- You’ve tested sending a smaller attachment if the problem persists.
Common Mistakes to Avoid
- Leaving the timeout at its default value when sending large files.
- Assuming every timeout error is caused by the mail server.
- Sending files that exceed attachment size limits.
- Closing the email application before the upload finishes.
- Using an unstable or slow internet connection for large uploads.
If This Didn’t Work
If you still receive timeout or Socket Error messages, please have the following information ready before contacting 1-grid Support:
- Your domain name
- The affected email address
- The exact error message or Socket Error code
- A screenshot of the error
- The name and version of your email application (for example, Microsoft Outlook, Apple Mail or Thunderbird)
- The approximate attachment size
- Confirmation that you increased the timeout setting
Providing this information will help us diagnose the issue more quickly.
Related Articles
- What Is the Maximum Size of Email for Sending and Receiving?
- I Can Browse the Internet, but I Cannot Get My Email
- Troubleshoot Errors in Outlook
- How to Configure an Email Account
- Why Are My Emails Not Sending?
FAQs
Why do I only get this error when sending large attachments?
Large files take longer to upload. If the upload exceeds your email client’s timeout setting, the connection is cancelled before the upload completes.
Will increasing the timeout make my internet faster?
No. It simply allows your email application to wait longer for the upload to complete.
What timeout value should I use?
A minimum of 15 minutes is recommended when sending larger attachments.
Can my email provider block large attachments?
Yes. Most email providers enforce maximum attachment size limits regardless of your timeout settings.
Should I compress large files first?
Yes. Compressing files into a ZIP archive can reduce upload time and may help avoid timeout errors.
What if smaller emails send successfully?
This usually indicates the issue is related to attachment size, upload speed or timeout settings rather than your email account itself.
Empowering Insight
Many email timeout errors are caused by upload time rather than faults with your mailbox. Adjusting your email client’s timeout setting and checking attachment sizes often resolves the issue without further troubleshooting.
Need Additional Support?
If you’ve completed the steps above and are still unable to send emails with larger attachments, the 1-grid Support team is here to help.
Contact us with the information listed in If This Didn’t Work, as it will help us investigate your issue more efficiently.