英语邮件写作的格式通常包括以下几个部分：

称呼

亲爱的 [姓名]，

尊敬的 [职位/头衔]，

敬爱的 [姓名或头衔]，

开头

简短地说明写信的目的。

如果适用，提及之前与收件人的交流或事件。

正文

详细阐述邮件的主要内容。

保持清晰、简洁，避免冗长。

使用正式的语气和礼貌的表达。

结尾

表达感谢或期待回复。

使用正式的结束语，如“此致敬礼”、“最好的祝愿”等。

签名，包括你的全名和可能的联系信息。

附件或额外信息

如果邮件中提到了附件，记得在邮件正文中提及。

```

Dear Mr. / Ms. [Last Name],

I hope this email finds you well.

I am writing to inform you that we have received your recent order for [product/service name]. We are pleased to confirm that we will process this order promptly and send you the necessary documents shortly.

Please let us know if there are any additional requirements or modifications you would like to make to the order. We value your business and are committed to ensuring that your experience with us is seamless.

Thank you for choosing our services. We look forward to a long and successful partnership.

Best regards,

[Your Full Name]

[Your Position]

[Your Company Name]

[Contact Information]

```

在撰写邮件时，请确保内容准确无误，语法正确，并且保持专业和礼貌。根据具体情况调整邮件的语气和内容，以适应不同的场合和收件人。