Error: self signed certificate in certificate chain Nodejs nodemailer express

Question

So I'm doing this app in Node.js with express and I have this error Error: self signed certificate in certificate chain

at Error (native)
    at TLSSocket.<anonymous> (_tls_wrap.js:1092:38)
    at emitNone (events.js:86:13)
    at TLSSocket.emit (events.js:185:7)
    at TLSSocket._finishInit (_tls_wrap.js:610:8)
    at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:440:38) code: 'ESOCKET', command: 'CONN' }
POST /contact/send - - ms - -

I have change the mail service and also disavaible my antivirus, I cant find the sokution online, and a little bit of help is good for everybody

Thank youu

Answer 1

There is a good discussion about using Nodemailer with self-signed certificates in this GitHub issue. Specifically, this post can help get rid of the error message:

If you know that the host does not have a valid certificate you can allow it in the transport settings with tls.rejectUnauthorized option:

var transporter = nodemailer.createTransport(smtpTransport({ host: "outmail.abc.co.th", // hostname secure: false, // use SSL port: 25, // port for secure SMTP auth: { user: "[email protected]", pass: "passwordmail" }, tls: { rejectUnauthorized: false } }));

However, if you believe the mail services you are trying to use have valid certificates, you might have a local issue with your machine or network.