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Emails

How to Write a Professional Email: Structure, Tone and Examples

How to write a professional email: subject lines, greetings, a clear purpose, tone, sign-offs and proofreading, with four worked examples.

By ZeroTell Editorial Team5 min read

On this page
  1. Start by deciding what you want
  2. 1. Write a subject line that does work
  3. 2. Choose the right greeting
  4. 3. Put the purpose in the first two lines
  5. 4. Keep the body short and organized
  6. 5. Make the request and the deadline explicit
  7. 6. Choose a professional sign-off
  8. 7. Get the tone right
  9. 8. Proofread before sending
  10. Before-and-after examples
  11. Common mistakes in professional emails
  12. Using AI to draft professional emails
  13. Key takeaways

A professional email has a specific subject line, a fitting greeting, a first sentence that states your purpose, a short body with one clear request, and a polite sign-off with your full name. Keep the tone courteous and direct, cut anything the reader doesn't need, and proofread names, dates and attachments before you send. The steps below walk through each part, with before-and-after examples.

Start by deciding what you want

Before you open a new message, answer one question: what should the reader do after reading this? Approve something, answer a question, attend a meeting, or simply know a fact. If you can't state it in one sentence, the email isn't ready yet.

That sentence usually becomes your first or second line.

1. Write a subject line that does work

The subject line decides whether your email gets opened now, later or never. Make it specific and, when possible, include the action or deadline.

WeakStrong
QuestionQuestion about the March invoice total
MeetingCan we move Thursday's review to 3 p.m.?
UpdateWebsite launch moved to May 12
Important!!Approval needed by Friday: vendor contract

Avoid all capitals, multiple exclamation points, and "Urgent" unless it truly is.

2. Choose the right greeting

  • "Hi [Name]," is standard in most workplaces today.
  • "Dear [Name]," suits formal situations: job applications, first contact with senior people, legal or official matters.
  • "Hello [Name]," is a neutral middle ground.
  • "Hi team," or "Hi all," for groups.

Use the name the person uses. If they sign "Sam," don't write "Samantha." If you're unsure of someone's title or gender, use their full name: "Dear Jordan Alvarez."

3. Put the purpose in the first two lines

Busy readers decide quickly whether to keep reading. Skip the warm-up. Compare:

I hope this email finds you well. I wanted to reach out because I've been thinking about the project and had a few thoughts I wanted to share with you regarding the timeline.

I'd like to push the design review back one week, to March 14. Here's why.

The second version tells the reader exactly what's being asked. A brief friendly line is fine, but don't let it delay the point.

4. Keep the body short and organized

  • One topic per email. Two unrelated requests in one message often means one gets ignored.
  • Short paragraphs. Two to four sentences each.
  • Lists for steps, options or multiple questions. Numbered questions make it easy to reply point by point.
  • Bold sparingly for a deadline or key decision.

If an email needs more than three or four short paragraphs, consider a document or a call, with the email as a summary.

5. Make the request and the deadline explicit

End the body by restating what you need and by when: "Could you confirm by Wednesday so I can book the room?" A reason with the deadline makes it feel like planning rather than pressure.

6. Choose a professional sign-off

Safe closings include "Best," "Best regards," "Kind regards," "Thank you," and "Sincerely." Follow it with your full name and, for external email, your title, company and phone number.

7. Get the tone right

Professional doesn't mean stiff. Aim for how you'd speak to a respected colleague: polite, clear, warm enough.

  • Replace passive phrases with direct ones: "The report was reviewed" becomes "I reviewed the report."
  • Soften requests without hedging: "Could you send the file by Friday?" rather than "I was just wondering if maybe you might possibly…"
  • Avoid sarcasm and jokes that depend on tone of voice. They often land badly in writing.
  • Watch emotional emails. If you're frustrated, write the draft, wait an hour, then edit.

8. Proofread before sending

Check, in this order:

  1. Recipients. Right people, right To/CC/BCC, no unintended "Reply all."
  2. Names and titles. Spelled correctly.
  3. Dates, times, numbers. Including time zones.
  4. Attachments. Actually attached, and the right version.
  5. Spelling and grammar. A grammar checker catches most slips.

Reading the email aloud is the quickest way to catch awkward sentences.

Before-and-after examples

1. Requesting information from a colleague (after)

Subject: Q3 sales figures for Thursday's board deck

Hi [Name],

Could you send me the final Q3 sales figures by Wednesday at noon? I need them for the board presentation on Thursday.

The regional breakdown is the most important part. If the numbers won't be final by then, a draft is fine and I'll note that on the slide.

Thanks,
[Your Name]

The "before" version of this email opened with two paragraphs about how busy the quarter had been and never mentioned the deadline. The rewrite puts the request in the first line and explains the stakes in one sentence.

2. First contact with an external partner

Subject: Introduction from [Your Company] about [topic]

Dear [Name],

I'm [Your Name], [Title] at [Company]. [Mutual contact] suggested I reach out because your team is working on [their project], and we're tackling a similar problem in [area].

Would you be open to a 20-minute call in the next two weeks to compare notes? I'm flexible on timing and happy to work around your schedule.

Best regards,
[Your Name]
[Title], [Company]
[Phone]

3. Following up after no reply

Subject: Re: Vendor contract approval needed by Friday

Hi [Name],

Following up on my note from Monday. I need your approval on the vendor contract by Friday to keep the April start date.

If you have concerns, I'm happy to go through them on a quick call. The contract is attached again for convenience.

Thank you,
[Your Name]

4. Delivering bad news to a client

Subject: Change to your delivery date

Dear [Name],

I'm writing to let you know that your order will arrive on [new date] instead of [original date]. Our supplier had a production problem with one component, and I'm sorry for the delay.

To make up for it, we've upgraded your shipping at no cost. If the new date causes problems for your team, please call me directly at [number] and we'll look at options together.

Kind regards,
[Your Name]

AI Email WriterAny email, drafted in seconds

Common mistakes in professional emails

  • Burying the request at the end of a long message.
  • Vague subject lines like "Hi" or "Quick question."
  • Overusing "Reply all" and CC.
  • Forgetting the attachment you mention. Many email apps can warn you; turn that setting on.
  • Writing when angry. Wait before sending.
  • Ignoring time zones when proposing meeting times to people elsewhere.

Using AI to draft professional emails

AI email tools are useful for a first draft, for shortening a rambling message, or for adjusting tone, such as making a reply firmer or friendlier. Give the tool the facts: who you're writing to, what you need, the deadline, and the tone. Then edit the result so it sounds like you, and check every name, number and date. Follow your company's rules on what information can be pasted into external tools.

Key takeaways

  • Know the one thing you want before writing.
  • Use a specific subject line and state your purpose in the first two lines.
  • Keep it short, organized and polite, with a clear request and deadline.
  • Proofread recipients, names, numbers and attachments every time.

Frequently asked questions

What is the best greeting for a professional email?

'Hi [Name],' works for most workplaces. Use 'Dear [Name],' for formal contexts, first contact with senior people, or job applications. Avoid 'To whom it may concern' when you can find a name.

How long should a professional email be?

Short enough to read without scrolling on a phone, when possible. Many effective work emails are under 150 words. If you need more, use headings or bullet points, or consider whether a call or document would be better.

Which sign-off is most professional?

'Best,' 'Best regards,' 'Kind regards,' and 'Thank you,' are safe in nearly every business setting. 'Sincerely,' fits formal letters and applications. Avoid overly casual closings with people you don't know well.

Is it okay to use AI to write professional emails?

Yes, many people use AI to draft or polish emails. Check facts, names and dates, adjust the tone so it sounds like you, and follow your employer's policies on using AI tools with work information.

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