Letter Box

Easily create and deliver personalized letters and acknowledgements individually or in bulk from an NXT List.

mail merge-final

A simple app that works from within Blackbaud Raiser’s Edge NXT. Designed with the whole team’s needs in mind, meaning your supporters get beautiful communications while your team get on with all their other tasks!


New feature: Individual Letter Editing

You can now open and edit individual letters in a Bulk Letters run or directly from the Constituent/Gift Tile.
Add that special message to a major donor, or anything else actually – the whole letter is editable before sending!

Editing an individual letter in the Constituent/Gift Tile.

Edit an individual Letter from the Constituent or Gift Tile
  • When you select your required document template 
  • Instead of clicking Create, simply click the dropdown by the Create Button and select Edit.
  • This will pop up the letter so you can edit it. 

NOTE: This does not save over your template. It simply creates (and attaches if selected) the individual letter complete with all your edits.

Editing a letter

Check out our User Guide here

Editing an individual letter in a Bulk Letters run

Select Letter to edit Bulk run

From a bulk letter run simply:

  • Open the individual letter
  • Make your edits and save
  • An icon will appear next to the letter you’ve edited.

NOTE: This does not save over your template. It simply modifies the individual letter

Check out our User Guide here

Edit an individual Letter in a bulk run
This Letter has been edited

Create individual letters and acknowledgements straight from the record

Letter Box Tile Download

Creating a personalized letter or gift acknowledgement for one of your supporters is as easy as:

  • Selecting a template
  • Choosing email or download
  • Clicking Create! 
Letter Box Tile email

Welcome letters, forms, receipts – all directly from a tile on the record. And you don’t even need to remember to track what you did – the app will automatically:

  • Create a Constituent action or mark the Gift as acknowledged
  • Add the PDF to the record as an attachment

Or generate letters in bulk from a List

Need to create your regular gift acknowledgement run or send a letter to a group of constituents? Have the records in a List?? Sorted…

Letter Box Bulk gifts list
Letter Box Bulk Constituent List

Bulk Letters enables simple generation of acknowledgement, letter or anything-else batches. All managed right inside RE NXT!

    • Select an NXT List and a template
    • Personalized PDFs are generated for download or email
    • Constituent actions are added or Gifts as marked as acknowledged automatically so you have a record

Plus create and manage your templates

The app has its own built-in editor meaning you can create and manage your templates.

Letter Box Template Editor
    • Beautiful easy to use HTML editor with all the features 🙂
    • Add merge fields from RE NXT
    • Manage default templates for different scenarios
Letter Box Template
Letter Box Gift personalisation

Pricing in US$

See here for pricing in AU$ and £ 

Free Plan


Individual Constituent Letters
Individual Gift Letters
Bulk Letters
500 Letters / month
5 Templates

Premium Plan


Individual Constituent Letters
Individual Gift Letters
Bulk Letters
Built-in Email Delivery
2,000 Letters / month
Unlimited Templates



Don’t just listen to us. Here are some comments from Letter Box users …

  • We'll be recommending Letter Box to everyone!

    [Our team] …is enjoying the ease of generating and re-generating the receipts.
    Catherine Hamlin Fistula Foundation
  • Love the free version

    I love the free version so much that I let them know [our team] I would really like to have the email function and more templates available.

    Nappa Land Trust
  • Thank you!

    Thank you for providing it free of charge with so many functions!
    Monte Cassino School


Check out our Knowledge Base for more information.
If you still have a question, please just get in touch, we’d love to help!

Another way we’d love to help you make your job easier is with our Email Marketing Connector

email marketing connector logo

Red Arc’s Email Marketing Connector allows you to seamlessly extend Raiser’s Edge NXT to employ a dedicated email marketing platform. 

You work with two amazing platforms, the connector transparently does all the hard work of making them operate as a single solution.