The returned array will be something like this:
array( 'IMAP4rev1', 'SASL-IR SORT', 'THREAD=REFERENCES', 'MULTIAPPEND',
'UNSELECT', 'LITERAL+', 'IDLE', 'CHILDREN', 'NAMESPACE',
'LOGIN-REFERRALS'
);
Before calling this method, a connection to the IMAP server must be
established. public capability ( ) : array(string) | ||
리턴 | array(string) |