Today while accessing Gmail & Google Apps on chrome, I encountered with the “Gmail 400 bad request”. I  tried to refresh the page & then thought about DNS cache issue ( which i have already resolved yesterday).

Anyway to crosscheck, I suddenly open the gmail on firefox & discovered that it is working fine & it have something to do with Chrome html encoding.

Gmail-400-bad-request2

Here is the process which i have followed to resolve the Gmail 400 bad request:

Step 1: Try loading Old Standard Gmail with this address mail.google.com/mail?ui=1

Result for me: Gmail 400 bad request

Gmail-400-bad-request1

Step 2: Try loading Gmail with Labs turned off mail.google.com/mail/?labs=0

Result for me: Bingo! It worked.

Gmail-400-bad-request0

Explanations

There are various types of html standard followed by Gmail to call the features in the web interface & sometimes the browser may create issues with a particular web formats so it is recommend to try any of the following standards.

  • New standard mail.google.com/mail?ui=2
  • Old standard mail.google.com/mail?ui=1
  • Labs turned on mail.google.com/mail/?labs=1
  • Labs turned off mail.google.com/mail/?labs=0
  • Basic HTML mail.google.com/mail/?ui=html
  • Mobile XHTML m.gmail.com

 

Let us know in case this doesn’t worked for you or have some better tip to share here!