How to Write Professional Emails in English: Phrases, Structure, and Common Mistakes

6 days ago
5 min read

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Professional email is the single most common form of written English in the workplace — and it's where non-native speakers are most often judged on their language ability, often without even realising it. A poorly structured email, a mismatched formality level, or a single word used in the wrong register can undermine weeks of relationship-building.

The good news: professional English email follows highly predictable conventions. Once you understand the structure, the formality levels, and the phrases that native speakers actually use, writing professional emails in English becomes a learnable, replicable skill.

This guide covers everything: structure, opening and closing phrases for different relationships and contexts, common mistakes to eliminate, and how to calibrate formality correctly.

The Structure of a Professional English Email

Every professional English email — regardless of purpose — follows the same basic structure:

1. Subject line — specific, informative, actionable. Never leave it blank. "Following up on our call" is better than "Hi". "Q3 report — ready for review" is better than "Report".

2. Salutation — how formal depends on your relationship (see below).

3. Opening line — context-setting or pleasantry.

4. Body — the purpose of the email, stated clearly and concisely. One purpose per email where possible.

5. Action request or next step — what you need from the recipient, stated explicitly.

6. Closing line — brief, forward-looking.

7. Sign-off and signature.

The most common mistake non-native speakers make: burying the point. Native English professional emails front-load the key information. Say what you need in the first or second sentence. Then explain the context.

Formality Levels: How to Calibrate Correctly

English professional email exists on a formality spectrum. Using the wrong level is one of the most common errors:

Relationship	Formality level	Example salutation
First contact, unknown recipient	Formal	Dear Mr / Ms [Surname],
Known professional contact	Semi-formal	Dear [First name],
Established colleague	Informal professional	Hi [First name],
Close colleague / peer	Casual professional	Hey [First name],

Important note: "Dear Sir/Madam" sounds dated in most professional contexts unless you genuinely don't know the recipient's name. If you know the name, use it.

Essential Phrases by Function

Opening Lines

"I hope this email finds you well." (semi-formal — very common, slightly formulaic)
"I'm writing to follow up on our conversation last week."
"I wanted to reach out regarding [topic]."
"Thank you for your email / quick response."
"Further to our meeting on [date]…" (formal)

Making Requests

"Could you please send me / let me know / confirm…?" (polite)
"I would be grateful if you could…" (formal)
"Would it be possible to…?" (careful, non-imposing)
"Please find attached [document]. I'd appreciate your feedback by [date]."

Giving Information

"I'm writing to inform you that…" (formal)
"I wanted to let you know that…" (semi-formal)
"Please note that…"
"As discussed / As mentioned in our previous email…"

Apologising

"I apologise for the delay in responding." (formal)
"Sorry for the late reply." (semi-formal)
"I'm afraid I'm unable to [attend / confirm / provide] at this time."

Declining or Pushing Back (Diplomatically)

"Thank you for the opportunity. Unfortunately, I'm unable to [X] at this time, but I'd be happy to [alternative]."
"I understand your position. However, from our side, [concern]."
"I'd like to revisit this, as I have some concerns about [aspect]."

Closing Lines

"Please don't hesitate to contact me if you have any questions."
"I look forward to hearing from you."
"Let me know if you need anything further."
"Looking forward to our next steps."

Sign-offs by Formality

Formality	Sign-off
Formal	Yours sincerely, / Yours faithfully,
Semi-formal	Kind regards, / Best regards,
Informal professional	Best, / Many thanks,
Casual	Thanks, / Cheers,

"Yours faithfully" is used when you don't know the recipient's name (Dear Sir/Madam). "Yours sincerely" when you do. In most modern professional contexts, "Kind regards" or "Best regards" is the safe default.

Common Mistakes Non-Native Speakers Make

Direct translations that sound rude. Some languages use very direct phrasing that translates awkwardly into English. "Send me the document" feels demanding in professional English — "Could you please send me the document when you have a chance?" is the natural equivalent. English professional email is heavily hedge-y compared to many other languages.

Overly formal language with familiar contacts. Writing "Dear Mr Smith, I am writing to enquire whether you might be available…" to a colleague you've worked with for three years sounds oddly stiff. Register should match the relationship.

Missing the action request. Many non-native English emails end without making clear what response or action is expected. Be explicit: "Could you confirm by Friday?" or "No response needed — just keeping you informed."

Overusing "please." "Please note that I please would like to please ask you to please confirm…" — English politeness comes from question structure and hedging, not from repeating please.

Starting with "I." Many style guides advise against starting a professional email with "I" (it can sound self-centred). Use: "Thank you for…", "Following our conversation…", "As requested…" to open instead.

Building Your Professional English Writing Skills

Writing professional emails well is partly knowledge (phrases, structure, conventions) and partly practice — developing an intuition for natural English professional tone that only comes from exposure and feedback.

Study Sessions on Nona can work directly on your professional writing — reviewing your emails, identifying register mismatches, and building the vocabulary range that makes professional writing feel natural rather than translated.

Speaking Sessions on Nona develop the wider language fluency that underpins writing quality — vocabulary range, confidence with complex sentence structures, and an ear for natural English. The skills are more connected than they appear.

Know your starting point before you invest in preparation. Take the free Nona CEFR Skill Test — the result tells you your current level, and the gap between where you are and B2 (professional writing fluency) is clearer when you have a specific level to work from.

Frequently Asked Questions

How formal should a professional email in English be? Match the formality to your relationship and context. For first-contact emails and formal institutions, lean formal. For established working relationships, semi-formal is more natural and less stiff. Overly formal language with familiar contacts can come across as distant or even passive-aggressive.

What's the difference between "yours sincerely" and "yours faithfully"? "Yours faithfully" is used when you open with "Dear Sir/Madam" (unknown recipient). "Yours sincerely" is used when you open with the person's name ("Dear Mr Smith"). In practice, most modern professional emails use "Kind regards" or "Best regards" — simpler and appropriate across contexts.

How long should a professional email be? As short as it can be while achieving its purpose. One main point per email where possible. If you need more than three short paragraphs, consider whether a meeting or call would be more efficient. Long emails are frequently not read in full.

Is it acceptable to use contractions (don't, I'll, we're) in professional emails? Yes, in semi-formal and informal professional emails. In formal contexts (legal, financial, first contact with senior stakeholders), full forms (do not, I will, we are) are more appropriate. Match the contraction level to the overall formality of the email.