mailbox

What Mailbox provides

Mailbox is described in its README as versatile email infrastructure that operates on AWS. The project is written in Go and carries an MIT license, which the README shows with a license badge linking to the MIT text. The documentation is offered in two languages, with an English README and a separate Simplified Chinese README linked at the top of the page. The README also displays status badges for tests, code coverage through Codecov, a Go Report Card, and a generic invitation for pull requests, which together signal that the project is maintained and open to contributions.

The README does not spell out every feature of the mail system in the excerpt, but it positions the software as infrastructure rather than a single app, meaning it is the backend that stores and processes mail on AWS services. The presence of both a web client and a command line client shows that the system is meant to be used interactively as well as scripted. The project's scope is broad enough that the maintainer splits the interface code into companion repositories, which keeps the core focused on the server side logic. A reader evaluating Mailbox should expect to combine the core with one of the clients to get a working experience, and should consult the linked docs for the precise capabilities the server exposes.

Web and command line clients

Mailbox separates its interface from its core by shipping two clients. The web client lives in a separate repository called mailbox-browser, and the README shows screenshots of it in both dark mode and light mode. The screenshots indicate the browser app presents a standard mail interface with theme support, though the exact feature set is documented in the companion repo rather than here. The README points readers to mailbox-browser for the web experience and shows the two theme variants side by side.

The command line client is installed with a single Go command, go install github.com/harryzcy/mailbox-cli, and further details are linked to the mailbox-cli repository. This split lets a user choose the interface that fits their workflow, with the CLI suited to terminal users and automation and the web app suited to everyday reading and writing. Both clients depend on the same backend running on AWS, so the choice is about presentation, not about capability differences in the core. The README's structure, with a Clients section split into Web and CLI subsections, makes clear that neither interface is bundled into the main repository. Someone deploying Mailbox needs to decide which client to use and follow that client's own instructions for setup and authentication against the deployed backend.

Deploying to AWS

The README gives a step by step deploy sequence built on the Serverless Framework. The first step is to clone the repository with git clone https://github.com/harryzcy/mailbox. The second step installs the Serverless Framework globally through npm with the command npm install -g serverless@v3, pinning version 3 so the deploy matches the framework the project expects. The third step creates an AWS IAM user with AdministratorAccess and exports the access key and secret as environment variables named AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY. The README notes that in production the IAM user should be set up following the official Serverless Framework credential guide rather than left at full administrator access.

The fourth step mentioned in the README is to set up AWS services, but the excerpt cuts off before detailing those services, so the specific AWS components Mailbox provisions are not listed in the text provided. What is clear is that the project targets a serverless AWS deployment, which typically means functions and managed storage rather than a long running server. The pinned serverless version and the exported credentials show the deploy is meant to run from a local shell with AWS access. A reader should plan to review the rest of the deploy section and the Serverless configuration in the repository before running the commands, since the IAM step in particular affects account security.

Editorial conclusion

Mailbox is written in Go and released under the MIT license, and its command line client installs with the command go install github.com/harryzcy/mailbox-cli. Deployment uses the Serverless Framework version 3 together with an AWS IAM user.