Gmail Error 400 – Resolve The Issue With Easy Fixes

Gmail is the email client that is developed by Google Inc. You can get this email service for free. Gmail has garnered a lot of attention because of the simplicity in its user interface within the website. Despite the fact that Gmail provides so many good features and storage capacity, even then you can you encounter many errors. One such error about which there will be a discussion about is the Gmail error 400.

What Is The Cause For This Issue

This section will provide the reasons behind the Gmail error 400. This error can occur if you have a multiple Gmail account within the Chrome browser. Even, if you attempt to send an email with an attachment then also you can get this issue. If the cookies are obsolete, then also, it possible for you get this error. If the DNS records are obsolete, where one data connects to an incorrect IP address, then also you can face this issue.

Effective Solutions For Gmail Error 400

In this section of the article, you will get various solutions that will help you to solve this error. Follow the points below to solve this error easily.

Utilize Developers Tool Option

  • First, right-click on the page where this error occured.
  • Next, from the pop-up options list, choose the ‘Inspect element’. After that, from the window ‘Developers Tools’ window, choose the ‘resources’ tab.
  • On the left-hand side of the window expand the section that says ‘cookies’.
  • From the list of cookies that are present choose a cookie that has a name ‘’.
  • After that, go to the option ‘GMAIL_IMP and right-click on it. Next, tap on the delete button and close the window.
  • Finally, you will have to reload or refresh the webpage, where the Gmail error 400 is being shown.

Remove Cookies From Your System

Cookies are the files that contain information regarding a website that you visit. The server utilizes this information to open the webpage quickly when you revisit it. If a cookie of a certain website like Gmail gets obsolete, then you might get the Gmail error 400 messages. So, the solution to rectify this error is to delete the cookie of that webpage.

  • First, launch the Google Chrome browser. Then, go to the upper right edge of the browser window and tap on the ‘three vertical dots’ to open the options menu.
  • Within that menu, find and select the ‘Settings’ option to display the browser’s settings page.
  • Now, locate and click on the ‘Advanced’ combo box button to show the advanced settings option for the Chrome browser.
  • Inside that section find the heading ‘Privacy and security’. Under that heading, locate the option ‘Content Settings…’ and click on it.
  • Among the lists of options, find and click the ‘Cookies’ option.
  • Again, a new page with a heading ‘Cookies’ will open up. In this page, there are various cookie related options. Choose the one that says ‘Show all cookies and site data’ and click to open it.
  • Next, on the new page tap on the ‘Remove All’ button to clear all the cookies.
  • If you just want to clear the Gmail accounts cookies, then in the search box type ‘’ and click on the ‘Trash’ icon to delete it.
  • Finally, tap the ‘done’ button and reload the Gmail webpage.

Remove DNS Cache

If there is any corrupted data within the DNS cache, then also you might get this error. Thus, the correct solution to get rid of this error is to delete all the data in DNS cache.

  • First, tap on the ‘Start’ menu, then in the search area type ‘command prompt’. From the search result, choose the option that says ‘Command Prompt’. This will show up on the screen.
  • Within the ‘Command Prompt’ just type the following command and hit ‘Enter’ key to execute the command – ‘ipconfig /flushdns’. This command will completely empty the data that is present inside the ‘DNS cache’.

Ending Notes

You can rectify the bad request 400 error easily if you follow the previous section carefully and minutely. But, even after following the above steps, you cannot able to solve this problem, then post your query on the comment section below and we will get back to you instantly.

Nathaniel Villa
Nathaniel Villa