This is what the broken lock sign on your Gmail means

The lock sign will appear in the same line as the email ID.
We are sure you must have noticed a little padlock sign on the top of mails on you have been receiving on Gmail of late and wondered what it is. This new security feature is meant to alert users of accounts that don’t have encryption and could be compromised.This doesn’t mean you should not continue to communicate with such accounts and is a safety feature to make you aware that there is a chance of someone other than the i