Deprecation warning of the punycode module

[ericfortis]

Node 21.1 deprecated punycode

[DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
    at node:punycode:3:9
    at Object.<anonymous> (…/node_modules/nodemailer/lib/mime-node/index.js:7:18)

The new documentation suggests:

Users currently depending on the punycode module should switch to using the userland-provided Punycode.js module instead. For punycode-based URL encoding, see url.domainToASCII or, more generally, the WHATWG URL API.

[charbelnicolas]

Any news on this?

[andris9]

No plans to change anything for now. Nodemailer, for various reasons, has no userland dependencies, and it is fully self-contained. Creating a punycode encoder for Nodemailer so that it would work with these very old Node versions (Nodemailer supports all Node.js versions from v6.0.0) is not a priority for now. At least not until Node 22 is released.

[axkibe]

If you don't want the dependency just copy punycode.js into your source base. (License MIT)

I guess the node team made it clear, they are not maintaining it anymore, so no loss the from coping the .js instead of depending on it.. They just left it for now for backward compatibility.

PS: At least already now the warning message is annoying.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[AlessioGr]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.

Commenting so this issue isn't closed.

[sanchyanchakraborty]

Observe the identical solution using a custom automated script. #1599
@SatyanshMittal

[hulkish]

It's going to be removed from node core at some point, so probably best to actually correct this issue by depending on punycode.js - as advised from node core for this

[andris9]

Fixed in latest version

[charbelnicolas]

Fixed in latest version

I can still see the warning with version 6.9.10, is there anything else I need to do to get rid of the warning?

[lukasguldstoev]

Same issue. Fixed after updating to v20.11.1, deleting package-lock.json, node_modules and reinstalling

nvm install 20.11.1
sudo rm -rf node_modules package-lock.json
npm i

[charbelnicolas]

Oops, sorry, my bad, it was mongoose's fault. It is working as expected now!

[alvaropsouza]

Fixed in latest version

I can still see the warning with version 6.9.10, is there anything else I need to do to get rid of the warning?

still see warning here:

[andris9]

Latest nodemailer does not use the punycode module anymore, so the warning is coming from somewhere else.

[projetos-sidnei]

I was getting this annoying warning, I updated yarn to version 4.1.1,
I updated node to version 21.7.1, deleted the node-modules folder and everything seems to be ok.
So for anyone who is having the problem, I believe this update should resolve it.