Yes, you can log in using any of the alias email addresses linked to your account. All of your account’s email aliases work in combination with your account password.
Once an email address has been created, it can no longer be edited. However, it is always possible to create a new email alias and delete an unwanted one. Before you delete an address, be absolutely certain that you no longer wish to use it. Once deleted, it will remain blocked and unusable for at least one year. So if you intend to get rid of a much-used address, you might want to consider keeping it long enough to be sure that all of your contacts have started using the new one.
By default, all messages sent to any of the email addresses associated with your account will arrive in your main inbox. If you wish, you can create a filter rule to automatically route them to a separate folder.
On your computer, sign in to your mail.com account.