Mail your letter in a special envelope, like Priority Mail or through special Delivery.
采用特殊信封，如优先邮件，或通过特别快递寄出。
2
Taking no chances with another failed delivery, Mr Blanc said his colleagues would make the two hour drive to Seix to hand over the envelope in person on June 5.
为了避免再次出现投递错误，布兰克先生决定亲自出马，不惜花费2小时，于6月5日与同事驱车前往。
3
The mail room personnel create an envelope by using the recipient information in your letter, seal your letter in an envelope, and drop the envelope in the mailbox for delivery.