When the door opened, Mrs. Pennington said "hello", but, before she had a chance to say "thank you", the mail blew out of the mailman's hands, into the house and the front door slammed.

门开了，彭宁顿太太说“你好”，但还未来得及说声谢谢，邮递员手里的邮件就被风刮进了屋子，前门砰地一下关上了。

youdao

"They all find out that you opened the mail and they get an invisible tracking number, so if you go to a store ... that number is reported to them and they can build that information into a database, " Catlett said.

CNN: Privacy groups ask FTC to close e-mail loophole