在邮箱中，找到需要回复的邮件，点击下方的回复即可。以网易163邮箱为例：
打开邮箱的首页，点击登录，输入邮箱的账号及密码进行登录。
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登录邮箱后，点击左侧的“收件箱”。并找到需要回复的邮件。
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打开需要回复的邮件，点击右上方的“回复”按钮。
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输入回复的内容，点击右上方的“发送”即可。
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点击后，便会提示发送成功，对方就会接收到回复的邮件内容。
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