TypeScript SMTP Client

Author: Jonathan M. Wilbur <[email protected]> Copyright Year: 2019 License: MIT License

Usage

import { Client } from "../source/Client";
import { Response } from "../source/Response";

// I am using port 26 here, because my ISP blocks ports 25.
// I specifically added a listener on port 26 on my email server for the
// purposes of testing this.
const client : Client = new Client("email.wilbur.space", 26);
(async () => {
    const connectResponse : Response = await client.connect();
    console.log(`${connectResponse.code} ${connectResponse.lines.toString()}`);

    const ehloResponse : Response = await client.ehlo("bigboiiii.com");
    console.log(`${ehloResponse.code} ${ehloResponse.lines.map((line) => line.toString()).join("\r\n")}`);

    console.log("MAIL");
    const mailResponse : Response = await client.mail("[email protected]");
    console.log(`${mailResponse.code} ${mailResponse.lines.toString()}`);

    console.log("RCPT");
    const rcptResponse : Response = await client.rcpt("[email protected]");
    console.log(`${rcptResponse.code} ${rcptResponse.lines.toString()}`);

    console.log("DATA");
    const dataResponse : Response = await client.data();
    console.log(`${dataResponse.code} ${dataResponse.lines.toString()}`);

    console.log("writing data...");
    const writeResponse : Response = await client.writeData("WHO WANTS A BODY MASSAGE?");
    console.log(`${writeResponse.code} ${writeResponse.lines.toString()}`);

    console.log("QUIT");
    const quitResponse : Response = await client.quit();
    console.log(`${quitResponse.code} ${quitResponse.lines.toString()}`);

})();

Notes

For testing, I had to change my test email server to listen on port 26, because my ISP blocks outbound port 25 traffic.

In my testing, it appears that the RCPT command hangs for tens of seconds. This might only be specific to my testing environment, which was testing against Postfix via plaintext SMTP on port 26 (not a typo).