I have difficulties to set up DKIM signing with node.js and nodemailer. Here is what I got: A regular self hosted SMTP-email like [email protected] on hosteurope A domain with DNS settings hosted at inwx Node.js 8.4.0
Step 1: Generating the DKIM keys. I went to / and entered my domain name and hit generate key or whatever. Then I got stuff I should put as TXT record into the DNS settings at my domain registrar. To ensure that it works I ran:
dig TXT default._domainkey.example
and got
; <<>> DiG 9.8.3-P1 <<>> TXT default._domainkey.mydomain
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28927
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;default._domainkey.mydomain. IN TXT
;; ANSWER SECTION:
default._domainkey.mydomain. 3554 IN TXT "k=rsa\; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAmwCHK6Szd9ObPoD9I4JkdB9+W7a/IzGKnntAbWnHitMxQyl4TsmofRm+RZDS/Ije99opzmjLBeaCiiNXYs6nvhaVR4lrN9IFpmaJ5yuyicmE9HCDM99qlPUUzgk4l3YAGVSNK83FS7UNc5r0Ymh1bWKKB6FFwqgjVAzP6yJ7Bst0C88Wko0UHSJqeg3Y4mfeys9p6yyro4" "HnFJ+UQGYtwGD11z5+MdHI9D5eIa1TC7t0VSRYll94n4VHZI43uGO+jk3tm/LCMaYaksEiMD55rLUg78VAhh0pDsNPowbeXxcBYITqv9oMn7tNZQQKmXRU5G/WwsBpi9wrJuja7vl22wIDAQAB"
;; Query time: 0 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Tue Oct 17 13:53:10 2017
;; MSG SIZE rcvd: 464
Look here how I set the public key in DNS settings:
Step 2: Downloading the private key. I put it in a file and named it dkim.pem.
Step 3: Set up a simple node.js program that sends a dkim signed email.
var fs = require('fs');
var nodemailer = require('nodemailer');
var EmailTemplate = require('email-templates').EmailTemplate
var path = require('path')
// config of nodemailer
var poolConfig = {
pool: true
, host: 'mail.example'
, port: 25
, secure: false // use SSL
, auth: {
user: '[email protected]',
pass: 'mypassword'
}, tls: {
rejectUnauthorized: false
}, dkim: {
domainName: 'example'
, keySelector: 'default'
, privateKey: fs.readFileSync('./certificates/dkim/dkim.pem', "utf8")
, cacheDir: '/tmp'
, cacheTreshold: 100 * 1024
}
};
// use config to generate a transporter
var transporter = nodemailer.createTransport(poolConfig);
// the email and its content as json
var user = {email: "[email protected]"};
var message = {
template : "contactform"
, subject : "Message from Simon"
, pageData : {formdata: {salutation : "salutation", firstname: "firstname", lastname : "lastname", phone : "phone", email: "email", subject : "subject", text : "text" }}
};
// send the email
if(user && user.email) {
if(message.template && message.subject && message.pageData ) {
var path_email = path.join(__dirname, 'templates', message.template)
var template_email = new EmailTemplate(path_email)
message.pageData.base_url = "";
console.log(message.pageData);
template_email.render(message.pageData, function (err, result) {
if (err) {
return console.error(err)
}
// actual sending of the email
transporter.sendMail({
from: "[email protected]", // sender address
to: user.email, // list of receivers
subject: message.subject, // Subject line
html: result.html,
text: result.text.replace(/<\/p>/g,'\n').replace(/<\/?\w+((\s+\w+(\s*=\s*(?:".*?"|'.*?'|[\^'">\s]+))?)+\s*|\s*)\/?>/g,'')
}, function (err, responseStatus) {
if (err) {
return console.error(err)
}
console.log("email send to " + user.email);
})
})
} else {
console.log("Error no template, subject or pageData", null);
}
} else {
console.log("Error no user or email", null);
}
// create a hello world nodejs server to wait until email has send...
var express = require('express');
var app = express();
app.listen(3000, function () {
console.log('Example app listening on port 3000. Waiting for email to be send...');
});
- Open the raw data of the received email and find no dkim anything. I have used apple mails feature to check the email, but there was no dkim records hash or whatever in the email. mail-tester does not give me a positive result on dkim as well. It just sais: "Your message is not signed with DKIM"
I appreciate any help that solves this issue :-) Thank you
I have difficulties to set up DKIM signing with node.js and nodemailer. Here is what I got: A regular self hosted SMTP-email like [email protected] on hosteurope. A domain with DNS settings hosted at inwx. Node.js 8.4.0
Step 1: Generating the DKIM keys. I went to https://www.port25./dkim-wizard/ and entered my domain name and hit generate key or whatever. Then I got stuff I should put as TXT record into the DNS settings at my domain registrar. To ensure that it works I ran:
dig TXT default._domainkey.example.
and got
; <<>> DiG 9.8.3-P1 <<>> TXT default._domainkey.mydomain.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28927
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;default._domainkey.mydomain.. IN TXT
;; ANSWER SECTION:
default._domainkey.mydomain.. 3554 IN TXT "k=rsa\; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAmwCHK6Szd9ObPoD9I4JkdB9+W7a/IzGKnntAbWnHitMxQyl4TsmofRm+RZDS/Ije99opzmjLBeaCiiNXYs6nvhaVR4lrN9IFpmaJ5yuyicmE9HCDM99qlPUUzgk4l3YAGVSNK83FS7UNc5r0Ymh1bWKKB6FFwqgjVAzP6yJ7Bst0C88Wko0UHSJqeg3Y4mfeys9p6yyro4" "HnFJ+UQGYtwGD11z5+MdHI9D5eIa1TC7t0VSRYll94n4VHZI43uGO+jk3tm/LCMaYaksEiMD55rLUg78VAhh0pDsNPowbeXxcBYITqv9oMn7tNZQQKmXRU5G/WwsBpi9wrJuja7vl22wIDAQAB"
;; Query time: 0 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Tue Oct 17 13:53:10 2017
;; MSG SIZE rcvd: 464
Look here how I set the public key in DNS settings:
Step 2: Downloading the private key. I put it in a file and named it dkim.pem.
Step 3: Set up a simple node.js program that sends a dkim signed email.
var fs = require('fs');
var nodemailer = require('nodemailer');
var EmailTemplate = require('email-templates').EmailTemplate
var path = require('path')
// config of nodemailer
var poolConfig = {
pool: true
, host: 'mail.example.'
, port: 25
, secure: false // use SSL
, auth: {
user: '[email protected]',
pass: 'mypassword'
}, tls: {
rejectUnauthorized: false
}, dkim: {
domainName: 'example.'
, keySelector: 'default'
, privateKey: fs.readFileSync('./certificates/dkim/dkim.pem', "utf8")
, cacheDir: '/tmp'
, cacheTreshold: 100 * 1024
}
};
// use config to generate a transporter
var transporter = nodemailer.createTransport(poolConfig);
// the email and its content as json
var user = {email: "[email protected]"};
var message = {
template : "contactform"
, subject : "Message from Simon"
, pageData : {formdata: {salutation : "salutation", firstname: "firstname", lastname : "lastname", phone : "phone", email: "email", subject : "subject", text : "text" }}
};
// send the email
if(user && user.email) {
if(message.template && message.subject && message.pageData ) {
var path_email = path.join(__dirname, 'templates', message.template)
var template_email = new EmailTemplate(path_email)
message.pageData.base_url = "https://example.";
console.log(message.pageData);
template_email.render(message.pageData, function (err, result) {
if (err) {
return console.error(err)
}
// actual sending of the email
transporter.sendMail({
from: "[email protected]", // sender address
to: user.email, // list of receivers
subject: message.subject, // Subject line
html: result.html,
text: result.text.replace(/<\/p>/g,'\n').replace(/<\/?\w+((\s+\w+(\s*=\s*(?:".*?"|'.*?'|[\^'">\s]+))?)+\s*|\s*)\/?>/g,'')
}, function (err, responseStatus) {
if (err) {
return console.error(err)
}
console.log("email send to " + user.email);
})
})
} else {
console.log("Error no template, subject or pageData", null);
}
} else {
console.log("Error no user or email", null);
}
// create a hello world nodejs server to wait until email has send...
var express = require('express');
var app = express();
app.listen(3000, function () {
console.log('Example app listening on port 3000. Waiting for email to be send...');
});
- Open the raw data of the received email and find no dkim anything. I have used apple mails feature to check the email, but there was no dkim records hash or whatever in the email. mail-tester. does not give me a positive result on dkim as well. It just sais: "Your message is not signed with DKIM"
I appreciate any help that solves this issue :-) Thank you
Share Improve this question edited Oct 18, 2017 at 13:18 rcpfuchs asked Oct 17, 2017 at 12:05 rcpfuchsrcpfuchs 8321 gold badge14 silver badges26 bronze badges1 Answer
Reset to default 5I finally got it. Basically it could not be a more stupid issue: I did not use the latest nodemailer version. I have used 2.4, but the dkim argument requires at least nodemailer 3 - I used nodemailer 4.2.