When sending a resume with a reference, it is important to write a professional email that highlights your qualifications and explains why you are the best candidate for the job. Here are some tips on what to include in the email:

1. Subject Line: Use a clear and concise subject line that accurately reflects the purpose of your message. For example, "Referred by [referrers name] for the position of [job position]."

2. Introduction: Start with a brief introduction that includes your name, the name of the person who referred you, and the position you are applying for.

3. Qualifications: Highlight your qualifications and experience as to why you are the best candidate for the job. Explain how your skills and knowledge align with the job requirements.

4. Resume: Attach your resume to the email and keep it concise and to the point.

5. Closing: Thank the recipient for their time and consideration, and express your interest in the position. End with a professional closing, such as "Sincerely" or "Best regards," followed by your name.

Here is an example email:

Subject: Referred by [referrers name] for the position of [job position]

Dear [Hiring Managers Name],

My name is [Your Name], and I was referred to your company by [referrers name], who suggested that I apply for the position of [job position]. I am excited to submit my application for this role, as I believe my qualifications and experience make me an excellent fit for the position.

I have recently completed my [educational qualifications], and I possess [number] years of experience in [field]. I am confident that my skills and knowledge align with the job requirements, and I am excited about the opportunity to contribute to your team.

Please find my resume attached to this email. Thank you in advance for your time and consideration. I look forward to hearing from you soon.

Sincerely,

[Your Name]