To block random emails from other companies to the users, collection of posted email addresses by using a collection program or other technical solutions without permission is not allowed.

Those who fail to comply shall receive a criminal penalty by Acts on Information and Communications Network.
In addition, the company shall take legal action against those who use the phrase "HDC YOUNGCHANG" on the title of an email without prior permission from the company or send a misleading email that the reader may falsely perceive as an email sent by the company.