この郵便を出してください。

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

mail service; postal service; mail; post; mail; postal matter; postal items

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to take out; to get out; to put out; to reveal; to show; to submit (e.g. thesis); to turn in; to publish; to make public; to send (e.g. letter); to produce (a sound); to start (fire); to serve (food); to begin ...; to start to ...; to burst into ...

to give; to confer; to bestow; to kindly do for one; to oblige; to favour; to favor