SecureMailMerge - Advanced mail merge for Outlook

The right email, with the right attachment, for every recipient. SecureMailMerge turns a spreadsheet or your Outlook contacts into individual emails, written and sent in Outlook. Check a test email before anything goes out.

How it works

1. Add your recipient list: an Excel or CSV file, or your personal or shared Outlook contacts.
2. Write the email once in Outlook. Insert any column into the subject and body. Keep your signature, formatting and images.
3. Review the recipients, send yourself a test, then generate the campaign for immediate or scheduled sending.

Attachments and messages

• A different attachment for each recipient: match filenames in your spreadsheet to invoices, statements, letters or reports. Several files per person, or one file for everyone.
• Individual CC and BCC per row, or the same people on every email.
• A separate reply-to address for responses.
• Send from your account, a sending alias, or a shared mailbox (with Send As permission).

Personalization

• Personalized subject lines and message text from any spreadsheet or contact field.
• Conditional content: different text depending on your data.
• Fallback values for empty fields, so a missing first name never breaks a greeting.
• Individual links per recipient and date formatting.
• Many-to-one: several rows for one recipient become a single email with a table.

Sending and control

• Schedule a start date, weekdays and sending hours. Set a delay between messages and a daily cap.
• Search, sort and filter the recipient list and untick anyone to skip.
• Pause, resume or cancel a campaign.
• Download an Excel send report with row status and submission times.
• No extra recipient or attachment size cap from the add-in; Microsoft 365 and organization limits apply.

Your data stays under your control

Your spreadsheet and message content are processed on your computer inside Outlook, and the finished emails are sent through your Microsoft 365 mailbox. Campaign content is not uploaded to our servers for processing. No open pixels or click tracking on your recipients. IT security and permissions guidance is in our Help Center.

Who uses it

Teams that send personal one-to-one email to a known list from their own mailbox: investor reports, client and member updates, invoices and quotes, employee letters. Nonprofits and associations, financial and professional services, B2B sales and account teams.

Requirements

Works in the new Outlook, classic Outlook for Windows, Outlook for Mac and Outlook on the web. No Microsoft Word required. Requires a Microsoft 365 Business or Education account; Outlook.com, Hotmail and Microsoft 365 Personal or Family accounts are not supported. Your organization may require administrator approval.

Pricing

All features are free, with a short promotional footer in each email. A paid license removes the footer. Per sending email address: monthly or annual on our website, or monthly through your Microsoft 365 subscription. Cancel any time.