How to Fix AWS SES \'x509: certificate signed by unknown authority\' Error?

Resolving AWS SES Error: x509: Certificate Signed by Unknown Authority

While attempting to deploy to a staging environment, you may encounter an error stating "Post https://email.us-east-1.amazonaws.com/: x509: certificate signed by unknown authority." This error indicates that the certificate used for TLS/SSL verification is not recognized by the system.

Solution: Install Root Certificates

In Alpine Linux Docker images, the necessary root certificates are not included by default. To resolve this error, add the following lines to your Dockerfile:

FROM alpine:3.6 as alpine

RUN apk add -U --no-cache ca-certificates

FROM scratch
COPY --from=alpine /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

By installing the root certificates, the system will be able to verify the certificate used by AWS SES, allowing emails to be sent successfully.

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