Alias is a virtual recipient address which is mapped to another local recipient address. Mails sent to the alias are handled exactly as if they were sent to the other address.
Edit local-recipients.js and insert the new alias mapping below the
comment ENTER YOUR RECIPIENT-DESTINATION MAPPINGS HERE.
For example if you have a user account with the name jane, and you want
to define an alternative address, jeannie for her, you shoud insert the following line:
... alias("jeannie@example.com", "jane@example.com"), ...
From now, mails sent to jeannie@example.com will be delivered to the
existing maildrop named jane.
Note: both addresses must be local addresses.