The Address icon in the Blitz window opens your Address Book. Use it to define aliases or mailing lists. An alias is special nickname you keep to refer to a correspondent.
Aliases are frequently shorter and easier to remember than the person's real name.
By defining an alias you cut down on the amount of typing necessary to send a message to someone, and you reduce the chance of error. A mailing list is the same as an alias, except that it refers to more than one person. Mailing lists and aliases are defined and used in the same way. Mailing lists and aliases are kept in the Address Book, which is maintained on the BlitzMail server. The easiest way to define an alias is to open a message from the correspondent you wish to have an alias for and choose the Add Sender to Address Book command from the Options menu.