How to Use Mail Merge in Word to Send Emails Step by Step

To send a mail merge from Word, prepare a recipient list with an email-address column, choose Mailings > Start Mail Merge > E-mail Messages, add and preview your merge fields, then select Finish & Merge > Send E-mail Messages. Word creates a separate message for each recipient and sends it through a compatible desktop email program, commonly classic Outlook for Windows. Set up that program and its sending account before you begin.

This is useful for sending the same announcement, invitation, or update with details such as each recipient’s name filled in automatically. It is not a way to send one visible group email: each recipient receives an individual message.

What You’ll Need

A desktop version of Word for Microsoft 365 and a mail client configured to send email. On Windows, classic Outlook is the usual option; Outlook on the web and the new Outlook for Windows are not substitutes for a compatible desktop mail client in this workflow.
A recipient list, preferably an Excel workbook saved as .xlsx. Give the first row clear column headings such as FirstName, LastName, and EmailAddress, and put one person per row.
A message draft and a reliable internet connection. Check that your email account is allowed to send the number of messages you plan to merge.

Step-by-Step

Prepare and check your recipient list. In Excel, put field names in the first row and recipient details underneath. Use one column for the full email address, with no extra text such as a person’s name or angle brackets in the same cell. Remove duplicate rows and correct spelling, spaces, and blank addresses. Keep the workbook on your computer or somewhere Word can access it, save it, and close Excel before connecting it to Word. If you are using another data source, make sure its columns are similarly labeled and complete.
Start an email merge in Word. Open a new document or the draft you want to use. On the Windows ribbon, select Mailings > Start Mail Merge > E-mail Messages. Word changes the document into the body of an email merge; it is not necessary to choose Envelopes or Letters first. On Word for Mac, use the Mailings tab and choose the email-message option under Start Mail Merge; the wording and placement can vary slightly by version.
Connect the recipient list. Select Mailings > Select Recipients > Use an Existing List, browse to the Excel workbook, and open it. If Word asks which table or sheet to use, select the sheet containing your headings and records, and confirm that the first row contains column headers. For a short list, you can choose Type a New List instead. Use Edit Recipient List to uncheck people who should not receive this particular message, sort records, or filter the list.
Write the shared message. Type the greeting and body in the Word document as you would want them to appear in an email. Keep the wording clear when read on its own, and include a useful sign-off and any necessary contact details. The standard email-merge sending dialog uses one subject line for all recipients, so do not rely on it to personalize the subject. If you need a name or other field in the message body, place the cursor where it belongs before inserting the field.
Insert personalization fields. Select Mailings > Insert Merge Field and choose a column, such as FirstName. For example, type “Hello ”, insert the FirstName field, and then add a comma. The document will show a field marker rather than a person’s actual name until you preview it. Use the exact field names from your source list, and insert one field at a time where you want the value to appear. You can insert fields in several places, including the greeting and body.
Preview records and check the details. Select Mailings > Preview Results. Use the next and previous record controls on the Mailings tab to inspect several recipients, including the first and last. Look for blank names, awkward punctuation, incorrect values, and text that does not fit when a name is unusually long. Turn Preview Results off if you need to edit the field layout. Also check the recipient list itself: previewing is not the same as sending a test email.
Send yourself a test first. The safest test is to make a copy of the recipient workbook containing only your own email address, then connect that copy and complete a test merge. Read the received message on a computer and phone if possible. Check the subject, formatting, links, spelling, and whether the merge fields filled correctly. Do not assume that a successful preview proves email delivery; a test message confirms that Word and your mail client can complete the sending process.
Open the email-merge sending dialog. When the message and test look right, select Mailings > Finish & Merge > Send E-mail Messages. In the dialog, choose the column containing email addresses in the To box. Enter a subject line, then choose HTML for a formatted message with links or basic styling, or Plain text for a text-only message. The dialog does not provide the usual options for adding attachments or separate CC and BCC recipients.
Choose the records and send. Under Send records, select All to send to everyone still included in the recipient list, or specify a record range for a smaller batch. Verify the To field, subject, format, and recipient range before selecting OK. Word hands the messages to the configured desktop email client for sending. Depending on the client and account, messages may appear in the Outbox briefly; keep the program open and check the Sent Items folder and any delivery notices afterward.

Common Mistakes

Choosing the wrong recipient column: The To box must point to the field containing complete email addresses, not names or company names. If you select the wrong field, messages may fail or be addressed incorrectly. Review the field headings in the dialog before confirming.

Leaving empty or outdated records in the list: A blank address can cause an error, and a stale address can send private information to the wrong person. Use Edit Recipient List to remove or exclude records you have not verified. A quick test does not replace checking the entire audience list.

Expecting the merge to attach files or personalize the subject: Word’s standard email merge dialog sends the document as the message body and applies one subject line to the batch. It does not attach a separate file for each recipient. If you need attachments or recipient-specific subject lines, use a suitable alternative workflow and verify it with a small test.

Sending to the full list before reviewing a sample: Preview Results lets you inspect fields, but it cannot show whether the email arrives as intended in a recipient’s inbox. Use a test recipient, then send a small batch if the list is large or the message is important.

Tips

Use simple, consistent headings without duplicate names, such as FirstName and EmailAddress. Avoid merged cells, blank heading rows, and subtotals in the source sheet; they can make it harder for Word to identify the correct data. If a field is optional, consider how the sentence reads when the value is blank. For instance, a greeting with a missing first name may be better replaced with a general greeting than left with an empty space.

Keep the email concise and readable. Use short paragraphs, descriptive links, and a clear next step. HTML is appropriate when you want basic formatting, but inspect the received test message because formatting can differ between email apps. Avoid using a large image as the only place where important information appears.

For a large distribution, split the list into smaller batches and check your mail provider’s sending limits before you start. Mail merge does not bypass those limits, and a sudden burst of similar messages may be throttled or flagged. Send only to people who should receive the communication, and verify the audience before each batch.

Keep the source workbook and final Word message together until the merge is complete. If you need to repeat the send later, update the source list carefully and make a note of which records already received the message so you do not unintentionally send duplicates.

Troubleshooting

The Send E-mail Messages command is missing or fails: Confirm that the document is set to E-mail Messages under Start Mail Merge and that you are using the desktop version of Word. On Windows, check that classic Outlook is installed, configured with an account, and available as the compatible mail program. Outlook on the web cannot receive Word’s desktop mail-merge handoff. On Mac, confirm that Outlook is configured and that Word has permission to access it; restart Word and the mail client if needed.
Messages do not leave the Outbox: Open the desktop mail client and check whether it is offline, disconnected, asking for a password, or waiting for an account setup step. Confirm internet access and try sending one ordinary email from that account. If that also fails, resolve the mail-client or account issue before running the merge again. Check Sent Items before retrying so you do not send duplicate messages.
Word shows the wrong names or addresses: Reopen Select Recipients or Edit Recipient List and verify the selected workbook sheet, header row, and included records. Make sure the field inserted in the document matches the correct column. Save corrections to the workbook, reconnect the list if necessary, and preview several records again.
Fields appear blank or the text looks wrong: Check that the source cells actually contain values and that the first row is being treated as headings. If you changed the workbook after connecting it, save it and refresh the data connection by selecting the list again. Inspect the first and last records, then send a new test rather than assuming the earlier test reflects the corrected source.
Only some messages arrive: Check for invalid addresses, provider sending limits, rejection notices, spam filtering, and mail-client Outbox errors. Compare the number of records you selected with the messages in Sent Items, but remember that a sent message is not proof it reached the inbox. Resolve the cause and send only to the records that did not receive the message.

Frequently Asked Questions

Does Word send each email separately?
Yes. A standard email merge creates a separate message for each selected record, addressed to the email value in that record. Recipients do not see the rest of the list in a To or CC line.

Do I need Outlook to use mail merge?
Word needs a compatible desktop email program to hand off the messages. Classic Outlook for Windows is the common setup on Windows; Outlook on the web is not the same thing. On Mac, use a configured desktop mail client supported by your Word version, and test the setup before sending to a list.

Can I add an attachment to every merged email?
The standard Send E-mail Messages dialog does not include an attachment option. If every recipient needs the same or a personalized attachment, use a different mail-merge tool or workflow that explicitly supports attachments, and test it with a small set of recipients.

Can the subject line be different for each person?
The standard Word dialog accepts one subject line for the whole merge. You can insert merge fields in the message body, but the dialog does not provide a per-recipient subject field. Use another workflow if personalized subjects are essential.

Can I send to only part of the list?
Yes. Use Edit Recipient List to filter or uncheck records before sending, or choose a record range in the Send E-mail Messages dialog. Confirm the selected recipients and range carefully before you click OK.

Can I use Word for the web?
The desktop mail-merge email workflow described here is for Word desktop. Word for the web does not provide the same complete email-merge sending process, so open the document in the desktop app and use a configured desktop mail client.

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Sources: Function behaviour and menu paths: Microsoft Support documentation for Excel. Method & sources

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