i will tell her not to give it to anyone in HK, except for emergency relatives use.
Some mails from HK church, coz they will naturally write down their HK address for church's record.
if you trust your maid, it is not big deal...when you receive the letters, remind you maid is good enough telling her to inform you if she needs to provide your address somewhere.
sometimes they are not intended to 'disclouse', but when filling the form in the church or HK agency, they will provide HK employer's address..