enhancement request: SMTP needs to support SSL

[vt-rcheng]

Is there an existing issue for this?

• I have searched the existing issues

Enhancement description

this is reopening of #9186

I am testing out localstack Cognito, and wanted to use its SMTP ability to send out email. I have configured the ENV to do so.

      - SMTP_HOST=smtp.exmail.qq.com:465
      - SMTP_USER=noreply@xxxx.xxx
      - SMTP_PASS=<smtp_password>
      - SMTP_EMAIL=noreply@xxxx.xxx

But when I register new user, Cognito did not send out email, but gave me error

docker-compose-cloud-container-localstack-1 | 2023-09-20T06:33:54.506 DEBUG --- [-functhread3] localstack.http.asgi : Error while writing responses: Connection closed (client_info: 172.30.0.1:56948)

using smtplib I noticed that I couldn't connect with SMTP but can connect with SMTP_SSL
Please add support for this. I doubt people use SMTP without SSL much these days

🧑‍💻 Implementation

No response

Anything else?

No response