Mail.send never ends

[bpingris]

Hi,

I'm using the @adonis/mail package to send mail with mailgun and I'm facing a weird issue. Here my code

await Mail.send(message => {
    message.from('[email protected]')
      .to('[email protected]')
      .subject('subject')
      .htmlView('emails/template', { params: 123 })
  }
)
response.ok('success')

The issue is that the Mail.send never ends and reponse.ok is never called. Howver the mail is well sent to the address I give.
I tried to restart of course but without success.
Do you have an idea of what the problem is ?

[bpingris]

So I tried to debug this part where I send the mail.
This is where the application hangs forever;

// https://github.com/adonisjs/mail/blob/36fee9d60eee26a4f0e1b710d34799da8ed71703/src/Mail/Mailer.ts#L67
const response = await this.driver.send(mail.message, mail.config);

I have no clue of what's going on here.
I would be happy if someone knows why this line is blocking :D !

[bpingris]

When I debug in VScode, I can see what's the line that seems to block is that:

	then(onFulfilled, onRejected) {
		// eslint-disable-next-line promise/prefer-await-to-then
		return this._promise.then(onFulfilled, onRejected);
	}

This comes from the package pcancelable, if that can help to find the issue

[bpingris]

Did anyone have this issue ? How can I test this behaviour more to find from where this problem comes ?
Isn't there a way to have a "debug" file and then run a node ace debug to run this said file ? could be faster to debug this.
Thanks

[thetutlage]

I suspect the call at the network level is taking time/getting blocked. Have you tried hitting the Mailgun API as a Curl request or using Postman?

[bpingris]

Yea I did and it works as you expect, the mails is sent without any issue on my side.
I tried again to send the mail from adonis and I still had the same behavior where the mail is sent but the code hangs forever.

[bpingris]

Yes I used the same code, I'll try with another network.
Did you use Mailgun to try it or did you use another service ?

[bpingris]

Ok big news, I launched a docker container with node 14.8, make my request and both the mail and the server response are ok !
I think for now I'll just dockerize my main adonis app with node 14.8

[bpingris]

Ok, false alert, I guess. I change my dockerfile to use node 14.10 (same version I have on my local computer), and it works too. So I tried again with my local node 14.10 but I still have the issue, this is so, so weird.
I will still dockerize my app but this mystery will haunt me wtf

[thetutlage]

Which operating system are you on? Maybe share this code with some of your friend and try to run it on their computer (without docker). For sure, this has to do something with the network. But I am no expert in networking, so can hardly suggest anything

[bpingris]

I'm on manjaro, I saw that adonis/mail uses nodemailer to send mails and I already used nodemailer for some projects without any issues like this one.