I got an error when using nodemailer on localhost, causing an internal server error (500): ERROR: SELF_SIGNED_CERT_IN_CHAIN
I found this thread on the issue: Npm SELF_SIGNED_CERT_IN_CHAIN on Azure, suggesting to do:
npm config set ca ""
but didn't help. also upgrading the npm didn't help:
npm update -g
所以就在我即将降级我的node.js（版本10.32）时，我发现了这个线程：
启动服务器时的 SELF_SIGNED_CERT_IN_CHAIN
暗示它是反病毒软件！！！那是阻止一些需要的证书。
禁用防病毒后，它起作用了！
Disable antivirus "Outbound email scan" SMTP
wanted a way to leave my anti-virus running, and so just disabled the SMTP scan on Avast and all works. Am sure there is a better way, but this works.
这是解决此问题的 Node.js 配方：
process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';