Buhler's psychophysical model was briefly confined to three functions with a qualitative difference: the context of the source addresser (Ausdrucksfunktion), of the receiver or addressee (darstellende Funktion), and of the destination or representation of the message (appellative Funktion).
Jakobson built on Buhler's person-oriented model, but he integrated into Buhler's indexicality the full semiotic cycle, the "first person of the addresser, the second person of the addressee, and the 'third person,' properly--someone or something spoken of" (1980a: 83).
Every letter, once it has been received, constitutes a new moment or event in the relationship between the addresser and the addressee.
The rhetoric, style, and tone of a letter correspond to the addresser's perception of his or her status in relation to the addressee.
Ellipsis is used in the corpus for economy, to establish a personal conversational tone between the addresser
and addressee so that familiarity and rapport are created.
Public relation form a big volume from customer's knowledge in particular to a brand; also word of mouth advertisement have high influence on familiarity of addressers
Jakobson's communicative functions (1960) and Grice's communication maxims (1975) denote a direct link between addresser
and addressee through a common metalinguistic function or code.
The rhetoric, style and tone of a letter correspond to the addresser
's perception of his or her status in relation to the addressee.