When sending your resume off in an email to a potential employer, it is imperative that your email sound professional and courteous. Cara Scharf's article on wetfeet.com summarizes the do's and don't's of email etiquette:
Make a good first impression:
Always include a subject - but keep it simple. Make it easy for the reader to know the exact purpose of your email by including your name and job title in the subject heading.
Be concise and polite:
No one wants to read a massive block of text. Try including a space between ideas or topics in the body of the email (every 2-3 sentences or so) so your email is easier to read. Also, never be pushy or assuming in your email...you want to convey a professional and polite tone.
Emails are not text messages:
Never use abbreviations or emoticons in emails to hiring managers or potential employers. Think of your email as an actual letter with a heading, greeting, body, and signature. Using complete sentences is a must!
Always read-over before clicking "Send":
Make sure you have the correct email address and name of the person you are sending your resume to (FYI - also make sure you know the reader's gender so you can properly address them as Mr., Ms., Dr., in the greeting). And of course, check for spelling and grammar errors and don't forget to attach your resume!
To read more about writing professional emails, read Cara Scharf's article on wetfeet.com: e-Etiquette

