Unable to resolve dependency tree when updating to Nodemailer V7
Environment
System: OS: Linux 6.16 Arch Linux CPU: (12) x64 AMD Ryzen 5 7640U w/ Radeon 760M Graphics Memory: 8.82 GB / 14.93 GB Container: Yes Shell: 4.0.2 - /usr/bin/fish Binaries: Node: 22.18.0 - ~/.local/share/nvm/v22.18.0/bin/node npm: 11.5.2 - ~/.local/share/nvm/v22.18.0/bin/npm npmPackages: next: ^15.5 => 15.5.0 next-auth: ^4.24 => 4.24.11 react: ^19.1 => 19.1.1
Reproduction URL
https://github.com/stanlee786/next-auth-example
Describe the issue
When trying to update from Nodemailer V6 to V7, I get the following error:
npm warn ERESOLVE overriding peer dependency
npm error code ERESOLVE
npm error ERESOLVE could not resolve
npm error
npm error While resolving: [email protected]
npm error Found: [email protected]
npm error node_modules/nodemailer
npm error peerOptional nodemailer@"^6.8.0" from @auth/[email protected]
npm error node_modules/next-auth/node_modules/@auth/core
npm error @auth/core@"0.40.0" from [email protected]
npm error node_modules/next-auth
npm error next-auth@"beta" from the root project
npm error
npm error Could not resolve dependency:
npm error peerOptional nodemailer@"^6.6.5" from [email protected]
npm error node_modules/next-auth
npm error next-auth@"beta" from the root project
npm error
npm error Conflicting peer dependency: [email protected]
npm error node_modules/nodemailer
npm error peerOptional nodemailer@"^6.6.5" from [email protected]
npm error node_modules/next-auth
npm error next-auth@"beta" from the root project
npm error
npm error Fix the upstream dependency conflict, or retry
npm error this command with --force or --legacy-peer-deps
npm error to accept an incorrect (and potentially broken) dependency resolution.Nodemailer V7 contains the following breaking change:
- SESv2 SDK support, removed older SES SDK v2 and v3 , removed SES rate limiting and idling features
How to reproduce
Try updating Nodemailer V6 to V7 in a Next.js 15 environment configured with NextAuth. Alternatively you can try installing Nodemailer V7, this will have the same result.
Expected behavior
Latest NextAuth version to support Nodemailer V7 and update without error.
Source: nextauthjs/next-auth