MailAdmin

MailAdmin is a simple web application written in golang for managing the virtual domains for a mail server.

The data is stored in a sqlite database which is then used by dovecot and postfix to get the appropriate data.

The application stores the passwords hashed with the bcrypt algorithm with a cost of 10.

Motivation

This application was created to ease the management of my personal mail server.

Quick start

1. Get the necessary dependencies:

   $ go mod tidy
   

2. Change the config.json file appropriately. The password is the bcrypt hash of the actual password for signing in. To change it just invoke the application from the command line with the following command: go run mailadmin.go -p. You can reuse the current hash which matches the password pass.

3. Create the sqlite3 database by invoking the application with the -m flag: go run mailadmin.go -m The database will be named as the dbname field in config.json.

4. Run the application: go run mailadmin.go and connect to localhost:8080 to sign-in. The default username is admin and the default password is pass. You can also compile the project with go build mailadmin.go and run the resulting binary.

Build a static executable

The command go build will build a single executable dynamically linked with the various libraries (included the libc).

That executable is not portable to all the Linux distributions because of a mismatch of the libc version.

You can statically link the executable but not against the GNU libc (glibc). You can use the musl libc instead.

Provided that the musl libc is installed the following command will build a complete statically linked executable:

$ CGO_CFLAGS="-D_LARGEFILE64_SOURCE" CC=musl-gcc go build --ldflags '-linkmode external -extldflags "-static"'

Disclaimer

May contain unintended bugs.