哦，信头是发信人域写信人的地址。

And how to write the address?

youdao

哦，信头是发信人域写信人）的地址。

Well, the heading is the sender's (or writer's) address.

youdao

向发信人询问联系方式和有关主持活动的公司的详细信息。

Ask for contact information from the sender and details about the company running the contest.

youdao

发信人是乔治先生。

The addresser is Mr. George.

youdao

发信人是乔治先生。

The addresser is Mr. George.

youdao