寄件人的英文：
sender

Customer Completion
寄件人填写

Sender's instructions in case of non-delivery (at sender's expense)
如无法投递，寄件人(费用自理)须知

The parcel was returned to the sender because the directions were incorrect.
包裹因姓名地址有误而退给了寄件人。

Reply to the sender and all the recipients Reply to the sender and all the recipients Reply All
回复发件人和所有收件人，回复发件人和所有收件人，回复全部

Sender's instructions in case of non-delivery (at sender's expense)
如无法投递，寄件人(费用自理)须知

Reply to sender and all recipients of the selected message
回复选定消息的发件人和所有收件人

The parcel was returned to the sender because the directions were incorrect.
包裹因姓名地址有误而退给了寄件人。

Some developing countries are both recipients and senders of migrant workers.
一些发展中国家既是劳动力迁移的输入国，又是劳动力迁移的输出国。