The advanced mail merge add-in for Outlook 365
Send mail merges with individual attachments, cc and bcc, add fallback values, and keep your spreadsheet on your own computer*.
Works in the new Outlook, classic Outlook, Mac, and the web. No Word required.
"Literally days of work compressed into minutes."
— Elizabeth S Chase
* Spreadsheets and message content are processed on your computer inside Outlook and sent through your own Microsoft 365 mailbox. Designed for GDPR, not certified against it.
How It Works
Send personalized emails to hundreds of recipients in three simple steps.
Upload your spreadsheet
Prepare an Excel or CSV file with a "To" column for email addresses and any other columns you want to personalize.
Write your email
Compose your message in Outlook and add personalization using {FirstName} style placeholders from your spreadsheet columns.
Click send
Preview your emails, then send. Each recipient gets a personalized message directly from your Outlook account.
Mail Merge with Microsoft 365 inside Outlook
No more juggling multiple tools to send email campaigns from Outlook.
Send tailored emails to a curated list of contacts from your personal email address using a modern interface built right into Outlook. Advanced features at your fingertips instead of the cumbersome Word mail merge reminiscent of the nineties.
- Send from your Microsoft 365 account
- All emails look like you sent them personally. That means better deliverability and higher response rates. Better results, faster.
- Send to a Spreadsheet.
- Many spreadsheet types are supported: Excel, CSV, TXT, Numbers, OpenDocument, Works, HTML tables, Quattro Pro, Lotus...
- Send to Contacts.
- Select recipients from your personal or shared address book and send campaigns including their personal information like name, company or department.
- Full Microsoft 365 message and attachment size.
- Send large files, long messages, videos or as many images as you like. SecureMailMerge adds no size cap of its own, so you get the full allowance your mailbox has, commonly 35 MB per message and up to 150 MB where your administrator allows it.
- Add individual attachments.
- Do you need to add a personal invoice, custom report or add a unique attachment per recipient. No problem, add a column with the filenames to your spreadsheet and upload the files.
- Send many-to-one.
- Do you need to send multiple rows to the same recipient? We support that too. Just activate the many-to-one mode and we will take care of the rest.
- Send up to your Microsoft 365 limits.
- Need to get the message out today? SecureMailMerge adds no recipient cap on any plan. Microsoft 365 work and school mailboxes can send to 10,000 recipients per rolling 24 hours by default, and your administrators can set lower limits.
- Personalize the emails.
- Use cells from your spreadsheet or contact details to make your emails feel personal to your recipients.
- Use rich formatting options.
- Add tables, signatures, images or anything else you're used to from Outlook. Use all of Excel's text formatting options.
- Send with common Outlook features
- like read receipts and high importance
- Send with CC and BCC recipients
- with individual values for each email
- Set a reply-to address.
- Send from one address while routing replies to a shared inbox, colleague or processing mailbox.
- Review recipients before you send.
- See every recipient in a table, filter and search, and untick anyone you want to skip. The count updates live, and your selection locks once sending starts.
- Get a report of every send.
- Download a report after each campaign showing who received which message, with attachments, message IDs and send times.
- Personalize with conditions.
- Show different text to different recipients with conditional blocks, and set fallback values so an empty cell never leaves a gap.
- Schedule when campaigns send.
- Choose the start date, the weekdays and hours it may use, the delay between messages, and a cap on how many go out per day.
- Send as an alias.
- If your Microsoft 365 is set up to let you send as an email alias, you can now use that to send mail merge campaigns.
- Send from a shared mailbox.
- Send As info@, sales@, or any shared mailbox address once your administrator has granted you Send As permission. Change the From field and SecureMailMerge does the rest.
- Works on Windows, Mac and Web.
- SecureMailMerge is a modern Office add-in and therefore works on all platforms that support Outlook. Finally you can mail merge from your browsers without installing Word or Excel.
Learn how to: Send to a Spreadsheet.
Learn how to: Send to Contacts.
Learn how to: Full Microsoft 365 message and attachment size.
Learn how to: Add individual attachments.
Learn how to: Send many-to-one.
Learn how to: Send up to your Microsoft 365 limits.
Learn how to: Personalize the emails.
Learn how to: Send with common Outlook features
Learn how to: Send with CC and BCC recipients
Learn how to: Set a reply-to address.
Learn how to: Review recipients before you send.
Learn how to: Personalize with conditions.
Learn how to: Schedule when campaigns send.
Learn how to: Send from a shared mailbox.
Get the job done, secure and fast.
IT departments love SecureMailMerge because it is easy to use and secure by default. You will love it because you'll be able to get your job done faster.
Confidential
No recipient tracking. No open pixels, no click logging.
Campaigns are generated inside Outlook, no data is ever sent to our servers for processing. Other email marketing services make you upload your customer data to their infrastructure. We don't, and we never track who you email.
Read the IT Security GuideNo Word required
A modern Office add-in: no Word, no COM add-ins, no installer, and an administrator can deploy it centrally. It updates itself.
Legacy mail merge tools depend on Word, Publisher and the decades-old Office merge engine, installed on every desktop by IT. SecureMailMerge is a modern Office add-in that runs in Outlook everywhere and updates itself automatically.
Sending to the max
No caps from us. Whatever your Microsoft 365 mailbox allows.
SecureMailMerge adds no limits of its own: you can send whatever your organisation's mailbox allows. Microsoft's default for Exchange Online is 10,000 recipients per rolling 24 hours per mailbox (recipients, not messages) and 500 recipients per message. These are Microsoft's defaults, not guaranteed capacity, and your administrator may set lower limits.
Full Control
Pause, resume or cancel campaigns sending at any time. Always know what is going on.
Need to restart your computer, change rooms and lose internet connectivity or just want a lunch break? No problem. If Outlook closes while messages are still being generated, open the add-in again and it picks up where it left off.
Confidential
No recipient tracking. No open pixels, no click logging.
Campaigns are generated inside Outlook, no data is ever sent to our servers for processing. Other email marketing services make you upload your customer data to their infrastructure. We don't, and we never track who you email.
Read the IT Security GuideNo Word required
A modern Office add-in: no Word, no COM add-ins, no installer, and an administrator can deploy it centrally. It updates itself.
Legacy mail merge tools depend on Word, Publisher and the decades-old Office merge engine, installed on every desktop by IT. SecureMailMerge is a modern Office add-in that runs in Outlook everywhere and updates itself automatically.
Sending to the max
No caps from us. Whatever your Microsoft 365 mailbox allows.
SecureMailMerge adds no limits of its own: you can send whatever your organisation's mailbox allows. Microsoft's default for Exchange Online is 10,000 recipients per rolling 24 hours per mailbox (recipients, not messages) and 500 recipients per message. These are Microsoft's defaults, not guaranteed capacity, and your administrator may set lower limits.
Full Control
Pause, resume or cancel campaigns sending at any time. Always know what is going on.
Need to restart your computer, change rooms and lose internet connectivity or just want a lunch break? No problem. If Outlook closes while messages are still being generated, open the add-in again and it picks up where it left off.
What are the benefits over traditional mail merge?
In a nutshell: Modern interface and more advanced features but still secure.
Easier to set up, just a few clicks
You want to get the job done, not waste time making sure everything works together. People around the world find it difficult to set up a mail merge in Outlook and Word. Especially if they're not familiar with the process.
More customization options and advanced features
The mail merge features in Office are decades old and haven't been updated with features you have now come to expect from such a tool. It's just plain frustrating when the tool prevents you from doing something you know it should be able to do.
Formatting like a professional
Ever received an email where the mail merge fields have a different font to the rest of the email? SecureMailMerge uses simple text tags that ensure the formatting is spot on. And you can test your email to your heart's content to make sure it looks great before you send it to everyone.
What Our Customers Say
Don't just take our word for it. See what our satisfied customers have to say about SecureMailMerge.
"Great tool. Was looking to do a mail merge for annual price increase ... Brilliant and very easy to use!"
"Easy to use. Very handy tool to send emails with attachments in bulk."
"Was great and easy to use. It sent emails, caught my errors and guided me through. A great value and product."
"Fantastic Product. This is one of the best Outlook Plug ins I have ever used. Saves time, easy to use and does exactly what I need it to do."
"Game Changer. The Outlook integration and ability to attach docs make this tool invaluable for our daily activity."
"Worked very well! I am really impressed with this Add-on. Highly recommended."
"FIXSHIPS Ship Brokering. Nice tool ,we liked"
"You'll thank me later. Whether you are emailing 5 customers or 500, this software will make the task easy."
"Superb time saver. The process is similar to Mail Merge, very easy to use, and it saves one a lot a of time with the sending of emails with attachments to long lists of recipients."
"Easier than Microsoft Mail Merge. I had been using Microsoft's mail merge to send emails with attachments ... It tells you which attachment is still missing or isn't correct."
"Great tool! It's crazy that Microsoft doesn't have something that is in built with this feature."
"The best add-on. This mail merge add-on has simplified my work a lot !"
"Very helpful. This app is very helpful for bulk sending personal documents to clients and easy to use!"
"Great tool. Was looking to do a mail merge for annual price increase ... Brilliant and very easy to use!"
"Easy to use. Very handy tool to send emails with attachments in bulk."
"Was great and easy to use. It sent emails, caught my errors and guided me through. A great value and product."
"Fantastic Product. This is one of the best Outlook Plug ins I have ever used. Saves time, easy to use and does exactly what I need it to do."
"Game Changer. The Outlook integration and ability to attach docs make this tool invaluable for our daily activity."
"Worked very well! I am really impressed with this Add-on. Highly recommended."
"FIXSHIPS Ship Brokering. Nice tool ,we liked"
"You'll thank me later. Whether you are emailing 5 customers or 500, this software will make the task easy."
"Superb time saver. The process is similar to Mail Merge, very easy to use, and it saves one a lot a of time with the sending of emails with attachments to long lists of recipients."
"Easier than Microsoft Mail Merge. I had been using Microsoft's mail merge to send emails with attachments ... It tells you which attachment is still missing or isn't correct."
"Great tool! It's crazy that Microsoft doesn't have something that is in built with this feature."
"The best add-on. This mail merge add-on has simplified my work a lot !"
"Very helpful. This app is very helpful for bulk sending personal documents to clients and easy to use!"
"Great Productivity Tool. SecureMailMerge makes it very easy to send personalized emails, with attachments, to my clients."
"Good Feature"
"It's Very Productive! I used to do Mail Merge using Microsoft Word ... With SecureMail Merge, it makes sending "bulk" report to numerous recipients a lot easier and indeed very productive."
"Amazing. Loved it and made my work easier"
"good add-in. The add-in works very well."
"Useful and reliable. Nice app!"
"Works well. Good plugin - works as advertised."
"Great features and easy to use. I have been using this for about a year ... The ability to send custom emails with attachments to multiple people per email is great."
"So Helpful. I was able to send a bulk email with complicated data super easily!"
"Great add in! This add in has made my life so much easier!"
"Easy to use and efficient."
"worked great! I often send out small email campaigns where our newsletter software is not appropriate ... It is fully integrated into Outlook, which was very helpful. I am very happy."
"Saved me hours. As many have mentioned, there are other workarounds for mail merges but they cannot send attachments. SecureMailMerge was the answer to that and it works great."
"Great Productivity Tool. SecureMailMerge makes it very easy to send personalized emails, with attachments, to my clients."
"Good Feature"
"It's Very Productive! I used to do Mail Merge using Microsoft Word ... With SecureMail Merge, it makes sending "bulk" report to numerous recipients a lot easier and indeed very productive."
"Amazing. Loved it and made my work easier"
"good add-in. The add-in works very well."
"Useful and reliable. Nice app!"
"Works well. Good plugin - works as advertised."
"Great features and easy to use. I have been using this for about a year ... The ability to send custom emails with attachments to multiple people per email is great."
"So Helpful. I was able to send a bulk email with complicated data super easily!"
"Great add in! This add in has made my life so much easier!"
"Easy to use and efficient."
"worked great! I often send out small email campaigns where our newsletter software is not appropriate ... It is fully integrated into Outlook, which was very helpful. I am very happy."
"Saved me hours. As many have mentioned, there are other workarounds for mail merges but they cannot send attachments. SecureMailMerge was the answer to that and it works great."
"Works really well and very user-friendly. I really like that you do everything from Outlook and don't have to do it from Word as other workarounds suggest."
"perfect for email campaigns. makes my job more easier and faster!"
"Securemailmerge. This replaced another version of mailmerge I was using and it is a great alternative ... I definitely recommend this as a tool to send out complicated mailshots."
"Amazing - smart - intuitive - easy to use - time saver. This was easier than the Microsoft mail merge using Word. I love how this checks for errors in my emails and attachments, too!"
"Fantastic Add-in. This little app is genius and a total life-saver ... makes it so easy and a real time-saver."
"Secure Mail Merge has taken the headache out of personalized emails with attachments ... They are a great support for our Non-Profit!"
"Brilliant Add-In!! Really easy to use and makes sending attachments in a big mail out so simple, going to each recipient as an individual. A fantastic product - Thank you!"
"Great tool, easy to use."
"Great Solution. I use it to automate tracking information to clients that I already store on a spreadsheet."
"Great product for advanced mail merge use cases. Works great for small campaigns and makes it easy."
"Absolutely fantastic! Crazy easy to use. A true problem-solver!"
"Great time saver. This is so easy to use and great value for money."
"SecureMailMerge is fantastic! Love it - easy to use and saves me a lot of time."
"Works really well and very user-friendly. I really like that you do everything from Outlook and don't have to do it from Word as other workarounds suggest."
"perfect for email campaigns. makes my job more easier and faster!"
"Securemailmerge. This replaced another version of mailmerge I was using and it is a great alternative ... I definitely recommend this as a tool to send out complicated mailshots."
"Amazing - smart - intuitive - easy to use - time saver. This was easier than the Microsoft mail merge using Word. I love how this checks for errors in my emails and attachments, too!"
"Fantastic Add-in. This little app is genius and a total life-saver ... makes it so easy and a real time-saver."
"Secure Mail Merge has taken the headache out of personalized emails with attachments ... They are a great support for our Non-Profit!"
"Brilliant Add-In!! Really easy to use and makes sending attachments in a big mail out so simple, going to each recipient as an individual. A fantastic product - Thank you!"
"Great tool, easy to use."
"Great Solution. I use it to automate tracking information to clients that I already store on a spreadsheet."
"Great product for advanced mail merge use cases. Works great for small campaigns and makes it easy."
"Absolutely fantastic! Crazy easy to use. A true problem-solver!"
"Great time saver. This is so easy to use and great value for money."
"SecureMailMerge is fantastic! Love it - easy to use and saves me a lot of time."
"Best Add-On!! I was introduced to this add-on last year and it has completely changed my life. From personalizing emails with attachments and sending hundreds in minutes, it is truly a game changer."
"Excellent tool. Very easy to use and efficient, comes with my highest recommendation."
"Wonderful Tool. Incredibly helpful when you need to send bulk emails with different attachments. Very easy to use as well, no training needed."
"Productive Feature. Seamless, stress free and does not some time way of send bulky emails with different attachments. It is an awesome feature on Outlook."
"Great mailing tool. Straightforward with an intuitive help page. Free version isn't obnoxious, but well worth the purchase for any sized business."
"Game Changer. I use this at work for my payroll platform, I am able to give a level of detail I was not able to do before. Thank you!!"
"Remarkable! This is the BEST program I have found for sending bulk emails. Literally days of work compressed into minutes."
"Great for recertification campaign. Have used this to send out recertification forms to management for auditing purposes, makes the process smooth and a lot easier."
"Amazing Time Saver. I have been looking for this product my whole career! Saves me so much time sending the same email over and over with a different attachment."
"Fantastic. Absolutely fantastic. Easy to install. Saved me hours and hours of work. Easy instructions as well. Great videos."
"Incredible software for Mail Merge. Solves Outlook's two big drawbacks: attachments and embedded links. Help department is fantastic and responsive. This tool is an absolute game-changer."
"Best Add-On!! I was introduced to this add-on last year and it has completely changed my life. From personalizing emails with attachments and sending hundreds in minutes, it is truly a game changer."
"Excellent tool. Very easy to use and efficient, comes with my highest recommendation."
"Wonderful Tool. Incredibly helpful when you need to send bulk emails with different attachments. Very easy to use as well, no training needed."
"Productive Feature. Seamless, stress free and does not some time way of send bulky emails with different attachments. It is an awesome feature on Outlook."
"Great mailing tool. Straightforward with an intuitive help page. Free version isn't obnoxious, but well worth the purchase for any sized business."
"Game Changer. I use this at work for my payroll platform, I am able to give a level of detail I was not able to do before. Thank you!!"
"Remarkable! This is the BEST program I have found for sending bulk emails. Literally days of work compressed into minutes."
"Great for recertification campaign. Have used this to send out recertification forms to management for auditing purposes, makes the process smooth and a lot easier."
"Amazing Time Saver. I have been looking for this product my whole career! Saves me so much time sending the same email over and over with a different attachment."
"Fantastic. Absolutely fantastic. Easy to install. Saved me hours and hours of work. Easy instructions as well. Great videos."
"Incredible software for Mail Merge. Solves Outlook's two big drawbacks: attachments and embedded links. Help department is fantastic and responsive. This tool is an absolute game-changer."
Is SecureMailMerge right for me?
See what makes us special and if maybe a different solution is better for you
Simple pricing, for everyone.
Free version with a promotional footer. One simple price to remove it. No hidden fees.
Free version
For anyone. Every feature, no time limit, no credit card
Free
- All features, unlimited campaigns*
- Adds a short promotional footer to each email
License
One license per sending email address, reassignable within your subscription
per month and user
- All features, unlimited campaigns*
- No promotional footer
- Pay by card, PayPal or through your Microsoft 365 subscription
License (annual)
One license per sending email address, reassignable within your subscription
per year and user
- All features, unlimited campaigns*
- No promotional footer
- Pay by card, PayPal or through your Microsoft 365 subscription
Prices are shown here in your local currency and may vary by country. The exact current price for your region is always displayed on this pricing page.
Prices are excluding applicable taxes which will be added on checkout.
*SecureMailMerge has no restrictions on the number of campaigns, emails or attachments,
but Microsoft 365 or your organisation may impose limits.
Get started today
Save time instead of patching together different tools and get the results your business deserves all while keeping your data safe.
Get it free for Outlook