Once you've opened the web address of your email provider, you will see a login page. Enter your email account's credentials (username and password) in the text fields provided. If you forgot your password, you can usually click the "Forgot Password?" link to reset it.

Simply run an exact match search for “@domainname.com” and you'll get results with any publicly available email addresses associated with that domain. However, if you want to find a specific person's email id, then you can try including their name in the search bar along with the domain name.

Opening multiple Gmail accounts is also a very simple process. Start by signing into your Google account and select your avatar in the top-right corner of your screen. Then, select + Add account, and then Create account.