Fixed Gmail error: A server error occurred and your email was not sent

Gmail is a very popular email service provider. However, it is not error-free. Many users have reported this error when trying to send an email through Gmail – a server error occurred and your email was not sent. This problem may be related to the Gmail service itself or your browser.

Some users have reported a Gmail error when trying to send an outgoing message. The error code is preceded by the following text: “There was a server error and your email was not sent. According to our research, the problem only occurs in Firefox and some other browsers, but not in Chrome.

If you are currently experiencing this specific problem, the following methods may help you. We have found some workarounds that users in a similar situation have used to avoid the Gmail error. Please follow the method you feel most comfortable with. Let’s get started!


What is the reason for the Gmail error “a server error occurred and your email was not sent”?

What is the reason for the Gmail error "a server error occurred and your email was not sent"?

The “Server error occurred and your email was not sent” error usually occurs when a Gmail client is unable to establish a working connection with its servers. You’re actually sending the email to Gmail’s servers, which, in turn, store it in the recipient’s account that you selected in the email. When this connection is difficult, you get an error message.

This problem is especially common in the Firefox browser, and many workarounds work for this problem as well. The most common solution is to disable Avast’s e-signature.

Other solutions are also possible, such as composing a new email, clearing the browser cache, reinstalling the browser, etc. We will go through them all one by one, starting with the most important workarounds.

The most likely causes of this problem are as follows.

  • It may be a new account that has not yet been recognized by Gmail.
  • You may be trying to send one message to multiple users.


How to fix the Gmail error “There was a server error and your email was not sent”

How to fix the Gmail error "There was a server error and your email was not sent"

Clear your browser cache and cookies

Google Chrome

  1. Launch Google Chrome
  2. Click the “Menu
  3. Select Tools
  4. Select Clear browser data
  5. Click “Clear cache” and “Cookies


  1. Start Firefox
  2. Go to the menu
  3. Choose Privacy -> Security
  4. Choose cookies and website data
  5. Click Clear data

Microsoft Edge

  1. Start Microsoft Edge
  2. Press Ctrl + Shift + Del
  3. Selecting Temporary Services and Folders
  4. Click Delete

Opera Browser

  1. Launch Opera browser
  2. Press Ctrl + Shift + Del
  3. Select Period Since the installation
  4. Check the box next to the Cached images and files.
  5. Select Clear browser data
Disable browser extensions

Google Chrome

  1. Start Google Chrome
  2. Click the Menu button.
  3. Choose more tools
  4. Select the cursor next to each extension


  1. Start Firefox
  2. Go to the menu
  3. Choose add-ons
  4. Select extensions
  5. Click the three-pointed icon next to each extension, then click Disable.

Microsoft Edge

  1. Start Microsoft Edge
  2. Select the Menu button
  3. Select extensions.
  4. Right-click the extension you want to remove and select Remove.
  5. You can also select an extension and click Delete.

Opera Browser

  1. Launch the Opera browser
  2. Select menu
  3. Go to Extensions.
  4. Navigate to each extension and click the “Disable” button.
Using a different browser

I know this may not be ideal, but if your antivirus doesn’t have a built-in setting that tells it to avoid scanning signature messages, you can try using a web browser other than Firefox to avoid the Gmail bug.

This method is usually preferable if you are satisfied with a third-party antivirus solution. So try using Chrome or Opera to send the same emails that you previously failed to send using the Gmail web app. Your outgoing emails should arrive at their destination without any problems.

Compose a new message

You should try to copy the same text you wanted to send and send it with the message you just composed. There are many cases where Gmail cannot properly configure itself and access its servers. In this case, try checking your Internet connection. If you are using a proxy server, try connecting to the Internet with such restrictions. Also, copy all the text (contained in the email you are trying to send), compose a new email, paste the text and try sending it to the recipient again.

Once you’ve cleared the cache and disabled all mail, you should no longer receive error messages from your Gmail server.


Frequently Asked Questions

  1. Open your email program (Outlook Express, Outlook, Eudora, or Windows Mail).
  2. On the Tools menu, click Accounts.
  3. Click on your email account, and then click on "Properties."
  4. Click the "General" tab.
  5. Make sure that the "Email Address" is your valid address for this account.
  6. Click on the "Server" tab.

This is usually due to an incorrect password, but can also be caused by an incorrect username, connecting to the wrong server, or getting blacklisted. To solve the problem, follow these steps: reset your email password.

An internal server error 500 is a very common HTTP status code that means something went wrong on the site server, but the server can't be more specific about the exact nature of the problem. In most cases, you can do no more than contact the site directly and wait for a solution.

Your Gmail account sometimes displays an error when you try to use it to send or receive mail. Gmail error messages can be caused by slow Internet connections, problems with your ISP's sites, browser errors, and more.

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Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog,, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.