How to write a professional email in French: the phrases and codes you need

Writing a professional email in French remains a codified exercise, where the opening line, the closing formula and the overall tone matter as much as the message itself. In 2026, the written communication guide published by the French Ministry of Culture in 2011 is still the reference: prioritise clarity, brevity and respect for the reader.

How should you open a professional email in French?

The opening sets the tone. For a recipient you don''t know, or barely, the expected line is « Madame, » or « Monsieur, » followed by a comma, on its own line. Avoid « Cher Monsieur » or « Chère Madame » before a first contact has been established: Projet Voltaire, a French reference on business writing, notes these forms are reserved for people you already know.

Between colleagues in the same company, « Bonjour Sophie, » is by far the most common opening and perfectly acceptable. If you don''t know your recipient''s name, « Bonjour, » alone works in a semi-formal context, but will feel too light for an administration or an important client.

Careful with « Bonjour Monsieur » or « Bonjour Madame »: several French correspondence guides criticise them, recommending you pick one register, never both at once.

Which closing formula should you use in each context?

The closing must match the level of formality of the opening. French professional writing works with three main registers.

• Formal register, to an unknown superior, a client, an administration: « Je vous prie d''agréer, Madame, Monsieur, l''expression de mes salutations distinguées. » or « Veuillez recevoir, Madame, l''expression de ma considération. » The formula must repeat exactly the title used at the opening.
• Semi-formal register, between professionals who barely know each other: « Bien cordialement, » or « Sincères salutations, ». These are the most common in everyday business exchanges.
• Between colleagues: « Cordialement, » is enough in most cases. « Bonne journée, » or « Bien à toi, » work for a warmer tone.

Projet Voltaire advises against overly pushy formulas such as « en espérant une réponse rapide » (hoping for a quick reply) or « daignez accepter » (deign to accept), seen as clumsy. « Merci d''avance » (thanks in advance) also needs care: French readers may take it as a subtle pressure, or even a disguised order.

How should you structure the body of the message?

The Ministry of Culture guide, published in 2011, is still the reference for written institutional communication in French. It sets three goals: put the user at the centre, make information intelligible, guarantee linguistic quality. In practice, that translates into precise rules.

• Short sentences: one idea per sentence, rarely more than 20 words.
• Concrete vocabulary; avoid acronyms and internal jargon.
• A clear subject line summarising the request in one line (« Demande de devis pour la commande XYZ ») rather than a vague word (« Question »).
• One paragraph, one topic. Separate context, request, useful information and attachments.
• Use « vous » and « nous » to personalise the exchange, without sounding authoritarian.

The ideal length for a first contact is between 80 and 200 words. Beyond that, offer a phone call or attach a document.

What capitals, accents and punctuation should you respect?

Three rules English speakers often miss, and they change everything.

• Accents on capitals are mandatory. « À bientôt » (not « A bientôt »), « Événement », « Île-de-France ». The French keyboard supports them; if not, autocorrect handles it.
• « Monsieur » and « Madame » are never abbreviated when you address the person directly. The abbreviation « M. » is only for a third party (« M. Dupont vous recevra »). « Mr » is an anglicism to avoid.
• A non-breaking space precedes double punctuation in French: colon, semicolon, question mark, exclamation mark. Most email clients add it automatically.

Finally, writing an entire email in capital letters is the equivalent of shouting. Same for full sentences in colour: they signal poorly controlled emotion.

Which mistakes should you avoid at all costs?

Some slips cost more than others.

• Switching between « tu » and « vous » in the same email chain. Keep the register you chose at the start.
• Replying too fast, without proofreading. A subject-verb agreement mistake in a signature is remembered longer than a one-hour delay.
• Forgetting the promised attachment: attach the file before writing the message.
• Using a closing formula without a final comma: « Cordialement » without the comma reads as dry, almost off-hand.
• Translating word-for-word from English. « Best regards » does not become « Meilleures salutations »: depending on context, the right equivalent is « Bien cordialement » or « Sincères salutations ».

An honest nuance: the codes are shifting. In some French start-ups and in tech, « Bonjour + first name » followed by a simple « Bonne journée » is replacing the classic formulas, even to a superior. Style is not frozen, but mastering the rules remains the best safety net: you don''t commit a faux pas when you know the convention before departing from it.

How can you improve your written French?

Three habits speed up progress. First, read real French professional emails: those you receive at work, those published in templates by professional associations or chambers of commerce. Second, have your important emails proofread before sending, by a native speaker or an online corrector. Third, practise rewriting the same message in the three registers: it anchors the nuances better than any list of formulas.

At Frenchee, our native teachers, all M2 FLE graduates, run live classes, one-on-one or in a small group of 3 to 5, with no subscription. Sessions focused on professional French include live correction of the emails and documents you prepare for your job. Confidence in written French often comes back in just a handful of targeted lessons.

Sources

• Académie française, « On s''envoie des mails », 4 May 2018: https://www.academie-francaise.fr/senvoie-des-mails
• French Ministry of Culture, Guide to good practice in written online communication, 2011: https://www.culture.gouv.fr/content/download/93481/file/guide_bonne-pratiq-com-ecrite-demarche-en-ligne-def.pdf
• Projet Voltaire, « Formule de politesse dans un e-mail : laquelle employer ? »: https://www.projet-voltaire.fr/ressources/formule-de-politesse-dans-un-e-mail/