英语邮寄作文的写作格式通常包括以下几个部分：

称呼

使用正式的称呼，如Dear Mr./Ms. [Last Name]，或者如果不知道对方姓名，可以使用Dear Sir/Madam。

问候语

简单问候，如Hello， 或者使用更正式的问候语，如Greetings!。

正文

开头：简短地说明写信的目的，如I am writing to inform you about... 或者I wanted to reach out to you regarding...。

中间：详细阐述邮件的内容，可以包括具体的信息、请求、建议或分享等。注意保持逻辑清晰，分段表述。

结尾：总结邮件内容，表达感谢或期待回复，如Thank you for your time and consideration. 或者Looking forward to hearing from you soon.

结束语

使用正式的结束语，如Best regards， 或者Yours faithfully。

签名

包括你的全名和可能的联系信息，如Your Name, [Your Position/Company]。

```

Dear [Recipient's Name],

I hope this email finds you well. I am writing to inform you that the 12,000 cycles you ordered will be ready for dispatch by 17th December. We are pleased to have completed all the necessary preparations and are eager to ensure a smooth delivery process.

Please let us know if there are any additional requirements or concerns you may have regarding the shipment. We value your business and are committed to meeting all your expectations.

Thank you for your trust and support. We look forward to a long and successful partnership.

Best regards,

[Your Name]

[Your Position/Company]

[Your Contact Information]

```

在写作时，注意保持语言简洁明了，避免使用过于复杂的词汇和句子结构。同时，确保邮件内容准确无误，及时回复对方的问题或请求。