Fetching a single column from a record returning function

Hi Friends,

Postgres 7.3.4 on RH Linux 7.2

I am using a record variable inside a functions and fetch the result via the follow command

select * from .fn_email(1)
as (email_folder_id int4,email_folder_name varchar,descrip varchar,msgcount int8,unreadcount int8,size int8);

Is it possible to fetch only one column (the 'msgcount') from the function. Because I am interested in SUM(msgcount). Please shed some light.

Regards
kumar