Usage of 'intrude'

Can some one please tell me which of the following two sentences is correct?

  1. Sorry for intruding into your mailbox
  2. Sorry for intruding your mailbox

Does such a usage exist?

Neither is appropriate. ‘Intrude’ = enter forcefully, illegally, etc. A mailbox is too small to enter.

Thanks Mister Micawber.

Can’t we use it figuratively either? By the way, I meant emailbox when I wrote mailbox.

It is not wise for non-native speakers to use words figuratively unless they have found precedent for it; it usually leads, as here, to confusion.