Answer:
Proper subject, well formatted email body, and allowed file types of attachment
Explanation:
You need to use a good and well-briefed subject. All the important details like your name and the precise of the issue must be mentioned in the subject. And the email main body can be elaborated to any extent but it must be ensured that all the details related to the issue are being covered and incorrect format. Also, you need to attach only the file types that the recipient allows, and you should not attach the ones that are not allowed. Otherwise, your email will not reach the recipient, and email service provider or the web host or the exclusive email service provider will reject your email, and not let it reach the recipient as recipient has already mentioned to them that these file types are not acceptable to him, which can be due to security concerns.
