Node.js nodemailer error - wrong version number/invalid greeting - node.js

Question

I have a big problem with setting up the nodemailer on my node.js server. Tried everthing I found on the internet but nothing works. The only thing that was easy to setup was the gmail service. but unfortunately I cannot use that one.
With secure set to true, i get an ssl error with the reason wrong version code.
[Error: 22468:error:1408F10B:SSL routines:ssl3_get_record:wrong version number:c:\ws\deps\openssl\openssl\ssl\record\ssl3_record.c:332:
] {
library: 'SSL routines',
function: 'ssl3_get_record',
reason: 'wrong version number',
code: 'ESOCKET',
command: 'CONN'
}
But when I try to set secure to false, then I get an invalid greeting error.
Error: Invalid greeting. response=* OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA ACL ACL2=UNION STARTTLS] Courier-IMAP ready. Copyright 1998-2016 Double Precision, Inc. See COPYING for distribution information.: * OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA ACL ACL2=UNION STARTTLS] Courier-IMAP ready. Copyright 1998-2016 Double Precision, Inc. See COPYING for distribution information.
at SMTPConnection._actionGreeting (C:\Users\Motiondata\Documents\repos\rmn_app\server\rmn_server\node_modules\nodemailer\lib\smtp-connection\index.js:1189:27)
at SMTPConnection._processResponse (C:\Users\Motiondata\Documents\repos\rmn_app\server\rmn_server\node_modules\nodemailer\lib\smtp-connection\index.js:932:20)
at SMTPConnection._onData (C:\Users\Motiondata\Documents\repos\rmn_app\server\rmn_server\node_modules\nodemailer\lib\smtp-connection\index.js:739:14)
at Socket.SMTPConnection._onSocketData (C:\Users\Motiondata\Documents\repos\rmn_app\server\rmn_server\node_modules\nodemailer\lib\smtp-connection\index.js:189:44)
at Socket.emit (events.js:315:20)
at addChunk (_stream_readable.js:309:12)
at readableAddChunk (_stream_readable.js:284:9)
at Socket.Readable.push (_stream_readable.js:223:10)
at TCP.onStreamRead (internal/stream_base_commons.js:188:23) {
code: 'EPROTOCOL',
response: '* OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA ACL ACL2=UNION STARTTLS] Courier-IMAP ready. Copyright 1998-2016 Double Precision, Inc. See COPYING for distribution information.',
command: 'CONN'
}
My code is the following:
const transporter = nodemailer.createTransport({
host: process.env.MAIL_HOST, // mx.example.com
port: process.env.MAIL_PORT, // 143
secure: true,
auth: {
user: process.env.MAIL_ADDRESS,
pass: process.env.MAIL_PWD
}
})
I checked the credentials a thousand time, they are definetly not the problem.
Hope anyone can help me.
Thanks in advance.

Answer 1

Refering to this issue mentioned here: https://github.com/andris9/Nodemailer/issues/165
See if this helps, adding the tls.ciphers option to use SSLv3:
const transport = nodemailer.createTransport({
host: process.env.MAIL_HOST, // mx.example.com
port: process.env.MAIL_PORT, // 143
secureConnection: false, // TLS requires secureConnection to be false
auth: {
user: process.env.MAIL_ADDRESS,
pass: process.env.MAIL_PWD
},
tls: {
ciphers:'SSLv3'
}
});
For Outlook365, this should work:
service: "Outlook365",
auth: {
user: '[YOUR_O365_EMAIL]',
pass: '[YOUR_O365_PASSWORD]'
},
Refer here: https://stackoverflow.com/a/37725123/9360885
If you're using HotMail, then remove host and port, and just add service: "hotmail".

Answer 2

use
secure: false, // true for 465, false for other ports
Example from nodemailer docs:
let transporter = nodemailer.createTransport({
host: 'smtp.ethereal.email',
port: 587,
secure: false, // true for 465, false for other ports
auth: {
user: account.user, // generated ethereal user
pass: account.pass // generated ethereal password
}
});
source: nodemailer examples

Answer 3

I used port 465 with Gmail and that worked. Got the "wrong version number" error with 587. Example below is for a GCP service account in a Cloud Function.
const transporter = nodemailer.createTransport({
host: "smtp.gmail.com",
port: 465,
secure: true,
auth: {
type: "OAuth2",
user: process.env.GMAIL_ADDRESS,
serviceClient: process.env.CLIENT_ID,
privateKey: process.env.PRIVATE_KEY.replace(/\\n/g, "\n"),
},
});

Answer 4

I also ran in this problem. But I managed to fix it.
It's quite simple to solve.
Solution:
port: process.env.MAIL_PORT * 1
This will change your process.env.MAIL_PORT type from a string to integer.
Why there was an error?
NodeMail require a port with a type of integer, but you were passing a string. So that caused an error.

Answer 5

If you are still receiving the issue, fix by inputting this into your browser manually while logged in.
https://accounts.google.com/DisplayUnlockCaptcha

Answer 6

change smtp port 587 to 465
smtp:{
name:"noreply#gmail.com",
host:process.env.SMTP_HOST,
secure: true,//true
port: 465,//465
auth: {
user: process.env.SMTP_USER,
pass: process.env.SMTP_PASSWORD,
}, // here it goes
},