Making an e-mail alias means setting up an e-mail address that shares the same mailbox as a totally different e-mail address for both the inbound as well as the outgoing email messages. For instance, you’re able to make an e-mail address sales@domain.com and it will be associated with its own mailbox. Next, you can make an alias support@domain.com, which will make use of the mailbox of sales@ and does not have a mailbox of its own. Every time you check your emails, you'll see email messages sent to both of the two addresses in one location, which can be more convenient in some cases because you will not have to sign in and out of different email addresses working with webmail or create various email addresses in an email program. This option is commonly used as an alternative to forwarding e-mail messages from one e-mail address to another one if a number of email addresses are mentioned for contact on a site.