Mail Merge in Word: Complete Guide for Outlook Users (2026)

Word’s Mailings tab is the built-in Microsoft 365 way to produce personalised emails, letters, labels, and envelopes at scale. If you’ve ever needed to send the same message to a hundred different people with each one addressed individually, this is the tool Microsoft designed for the job.

This guide covers every part of the Word mail merge workflow for Outlook users — from starting the wizard to hitting send — plus the known limitations and a modern alternative.

What Word’s mail merge can do

Word mail merge supports four document types:

Document type	Use case
Letters	Printed personalised letters
E-mail Messages	Personalised emails sent via Outlook
Envelopes	Printed envelopes with individual addresses
Labels	Mailing labels, name badges

For most Outlook users, E-mail Messages is the relevant type. This guide focuses on that.

Prerequisites

• Microsoft Word (any Microsoft 365 version)
• Classic Outlook set as default email client on Windows
• An Excel spreadsheet with your recipient data

The Mailings tab: a quick orientation

When you open a blank Word document and click the Mailings tab, you’ll see five groups:

1. Create — for envelopes and labels only
2. Start Mail Merge — choose the document type and start wizard
3. Write & Insert Fields — connect data and insert merge fields
4. Preview Results — check before sending
5. Finish — complete the merge and send

You work left to right through these groups.

Step 1 — Start Mail Merge

Click Start Mail Merge → E-mail Messages.

Alternatively, click Start Mail Merge → Step-by-Step Mail Merge Wizard to use a guided panel on the right side of the screen. The wizard is helpful if this is your first time — it walks through each step sequentially.

Step 2 — Connect your data source

Click Select Recipients in the Write & Insert Fields group.

You have three options:

• Type a New List — build a simple contact list inside Word
• Use an Existing List — connect to an Excel spreadsheet (recommended)
• Choose from Outlook Contacts — pull contacts from your Outlook address book

For most scenarios, Use an Existing List with an Excel file is the best choice. It keeps your data portable and easy to edit.

After selecting the file, Word asks which worksheet to use. Select the sheet containing your recipient data and click OK.

Filtering and sorting recipients

Before writing the email, click Edit Recipient List to review and optionally filter your list. You can:

• Uncheck individual rows to exclude them
• Sort by any column
• Filter to only rows where a column matches a value (e.g. only send to contacts in “Germany”)

Step 3 — Write the email template

Write your email in the Word document. Format it with bold, italic, bullet points, or any Word formatting — it will be converted to HTML when sent via Outlook.

Inserting merge fields

Place your cursor where you want personalised data to appear, then click Insert Merge Field and choose the column name from the dropdown.

Word inserts a grey field code: «FirstName», «Company», etc.

You can insert the same field multiple times. Example:

Subject: Invoice for «Company»

Dear «FirstName»,

Please find your invoice «InvoiceNumber» attached. The total due is «Amount».

Best regards

Rules (conditional content)

Word’s Mailings tab includes a Rules feature that lets you conditionally include or exclude content based on field values:

• If…Then…Else — shows different text depending on a field value
• Skip Record If — skips a recipient if a condition is true
• Merge Sequence — inserts a sequential number for each record

To access Rules: Mailings → Write & Insert Fields → Rules.

Step 4 — Preview results

Click Preview Results (or press Alt+Shift+N). The field codes are replaced with real data.

Use the arrows in the Preview Results group to scroll through recipients. Watch for:

• Blank fields where data should appear
• Incorrect capitalisation
• Extra spaces around field values
• Date or number formatting issues (fix these in Excel, not Word)

Click Check for Errors to run an automated scan before sending.

Step 5 — Finish & Merge

Click Finish & Merge → Send Email Messages.

A dialog appears:

• To: select the column containing email addresses
• Subject line: type the subject (same for all recipients)
• Mail format: HTML is recommended; Plain Text removes all formatting

Click OK. Word sends each personalised message to Classic Outlook, which delivers them individually from your mailbox.

Mail merge to a new document vs. sending directly

Instead of sending immediately, you can click Finish & Merge → Edit Individual Documents to generate a new Word file containing all the personalised emails as separate pages. This lets you review every single version before sending.

Useful for small batches where accuracy is critical (legal notices, financial communications).

Limitations of Word mail merge for email

Limitation	Impact
No individual attachments per recipient	Everyone gets the same attachment
No subject line personalisation	Subject is static for all recipients
No open or click tracking	No visibility into engagement
Broken in New Outlook	Can’t use if New Outlook is default
Formatting can degrade	Complex Word formatting doesn’t always survive the HTML conversion
No scheduling	Sends immediately

Alternative: mail merge from inside Outlook

The SecureMailMerge add-in handles all of the above from directly inside Outlook’s compose window — no Word involved:

• Individual attachments per recipient (add an Attachments column to your spreadsheet)
• Personalised subject lines
• Works in New Outlook, Classic Outlook, Mac, and Web
• Your data never leaves Outlook

Install it from the Microsoft AppSource in under two minutes.

FAQ

Can I use Word mail merge with Gmail or another email client? No. Word’s “Send Email Messages” only works with Classic Outlook on Windows as the default email client.

Can I mail merge from Word without Excel? Yes — you can type recipients directly into Word using “Type a New List,” or import a CSV file, or connect to your Outlook Contacts. Excel is the most flexible option for large lists.

Does Word mail merge work on Mac? Word on Mac has the Mailings tab, but sending via Outlook for Mac has historically been unreliable. For Mac users, the SecureMailMerge add-in is the recommended approach.

Can I save a mail merge document and use it again? Yes. Save the Word document normally. When you reopen it, Word will ask whether to maintain the connection to the data source. You can reconnect to the same or a different Excel file before sending again.

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Related guides:

• Mail merge in Outlook — the complete guide
• How to mail merge from Excel to Word
• Mail merge from Excel — spreadsheet setup tips
• How to do a mail merge — beginner overview