我要一些关于邮寄方面的词汇和句子（比较常用的就可以了）。谢谢各位！

I want to sent this by sepecial delivery.
I would like to send this letter registered.
What's the postage on this parcel to China, please?
What's the maximum weight allowed?
I want to pick up my parcel, this is the notice.
Can I catch th last mail today?
When does the first post go out?
Can I buy some stamps here?