NEKO MAIL WORKER

A script and local client to allow you release the capability of sending and reciving emails using cloudflare worker!

Neko Mail Worker is designed to use the power of cloudflare email worker with D1 database and RESTful API to create a mail server, while equipt a basic local client to transform the RESPful API into POP3 and SMTP protocol.

Usage

Clone this responsetory, and make sure there's node.js on your computer.

Then:

Configuration

server side

First, you need to enable Email Routing function on your cloudflare dashboard. There is the official documentation.

Then, type following command while link the project to your account:

cd email_worker/
npm install
npx wranger login
npx wrangler d1 create maildb_d1

Copy its output to fill the data in wrangler.toml

For now, cloudflare hasen't enable the API for email worker. So let's use some alternative way instead.

Then open wrangler.toml. You should see the send_mail field. Edit the name field inside it with the email address you will use.

Then open schema.sql and add your admin account. Here is an example:

drop table if exists users;
create table if not exists users (
    username text primary key,
    password text not null,
    token text not null
);
insert into users (username, password, token) 
    values ('[email protected]', 'testerpass', 'a_random_token');

drop table if exists meta;
create table if not exists meta (
    token text primary key,
    is_admin boolean not null default 0,
    mail_num integer not null default 0,
    mail_size integer not null default 0
);
insert into meta (token, is_admin, mail_num, mail_size)
    values ('a_random_token', 1, 0, 0);

drop table if exists mail_a_random_token;
create table if not exists mail_a_random_token (
    mail_id integer primary key autoincrement,
    mail_size integer not null,
    mail_content blob not null
);

Change the password to someting simple, you will be able to edit from the client to generate a sha256 hashed version after fully setup. But protect the token carefully! As it's expected to generate randomly and we use this to indicate a user.

Then deploy the worker with:

npm run deploy

Then connect it to your cloudflare zone:

• Goto the zone you want to use the worker
• Choose EMAIL field
• Edit Catch All rules
• Select "Send to a worker" and your worker

Then create the database with:

npx wrangler d1 execute maildb_d1 --file=./schema.sql

Now you have successly setup the worker part!

client side

Create the conf.json inside local-client with template conf_template.json.

Edit the server firld to your worker's address

Edit two ports to whatever you like(notice 25 and 110 maybe used)

Now move back to the project root dir, run:

cd local-client
npm run compile
npm run start

Then, set any of the email client application to connect to the local POP3 and SMTP with your admin account. Here use Kmail as an example:

Now you are ready to go!!

LIMITATIONS

Sadly, due to email worker is still a new thing, cloudflare haven't added the API control to it. So if you want to add a new sender, you MUST edit from the binding list...

Though the place is reserved, as long as the cloudflare added the API, we should use this function asap.

TODO

• [] Frontend for the user system.