推销信的英文开头通常遵循以下结构：

称呼：

使用正式的称呼，如 "Dear Mr. [Surname]" 或 "Dear Sirs,"。

介绍自己：

简要介绍自己或所代表的实体，如 "I am [Your Name], Product Manager at [Your Company]."

表达目的：

说明写信的目的，如 "I am writing to introduce our company's latest product line - [Product Line]."

引起兴趣：

通过提出问题、使用名人效应、引用名言或提及对方可能感兴趣的事物来吸引对方的注意。

提供依据：

简要说明为什么对方会对你推销的产品或服务感兴趣。

下面是一个推销信的英文开头示例：

Dear [Recipient's Name],

As [Your Position] at [Your Company], I am thrilled to introduce our revolutionary [Product Category] - [Product Name], designed to [brief description of the product's benefits or features].

We understand that [mention the core benefit or problem the product solves for the customer]. That's why our [Product Name] offers [mention unique selling points or key features].

We would be delighted to [offer something in return, like a free trial, a discount, or a meeting] to discuss how [Product Name] can [solve a specific problem or meet a particular need].

Please feel free to [encourage further action, like scheduling a meeting or asking for a callback] at your convenience.

Looking forward to the opportunity to speak with you.

Best regards,

[Your Name]

[Your Position]

[Your Company]

[Contact Information]

请根据具体情况调整上述模板中的内容