There are quite a few ways by which you can create multiple email addresses inside Gmail.
For instance, if your email address is firstname.lastname@example.org , any email that’s addressed to either email@example.com or firstname.lastname@example.org will also be delivered to your main inbox since Gmail ignores dots and anything that’s after the plus symbol in email usernames.
Therefore, theoretically speaking, you get an unlimited number of email addresses with one Gmail account. This gets even more interesting if you are using Gmail with Google Apps.
Email Aliases in Gmail for Google Apps
In the case of Google Apps, you can assign nicknames to your email account and messages that are addressed to the nickname (or alias) are also delivered to you.
For instance, if you run a website at example.com, you can have one mail email address and then setup aliases like email@example.com (for blog tips), firstname.lastname@example.org (for potential advertisers) and so on. Thus you have to deal with only one inbox.
To setup an email alias in Google Apps, log in to google.com/a/example.com as an admin (replace example.com with your domain name) and click the “Users and groups” option.
Select the email username for which you wish to setup aliases and then click “Add a nickname” to associate another email username with this user. You may associate up to 30 different nicknames per user in Google Apps.
When you reply to an email that’s addressed to one of your nicknames, the “From” address may still have your main email address. You can however change that quite easily.
Open your Gmail Inbox – > Settings – > Accounts and click “add another email address you own” under “send mail as.” Type your new email alias here, verify the code and you’ll now have an option to decide which of your email addresses should show up in the “From” field.
Thus, if you ever want a new email address, you don’t have to create another user in Google Apps – just add a new nickname to your existing email address.
Related: Check Multiple E-Mail Accounts