Every Gmail user has two email addresses. For example: if you have a Gmail id: xyz@gmail.com , the second one is xyz@googlemail.com . This will be useful for opening multiple accounts in a website or app. For example, In Redbus mobile app, if you are new user (i.e., if you use new email id) you will get flat 100 rupees off on ticket booking. If you have already used xyz@gmail.com you can still use xyz@googlemail.com and take advantage of the offer. You will receive your ticket to your normal inbox itself. Thank me for saving your time from creating a new email account. Ref: All Gmail Users Have Two Email Addresses The dots in the Gmail id doesn't matter. Lets say your gmail id is someone.initial@gmail.com , then if somebody is sending email id to so.meoneinitial@gmail.com or someoneiniti.al@gmail.com then the email will be delivered to someone.initial@gmail.com inbox itself.