Introduction
This article explains how to configure curl to establish an authenticated SMTP connection via STARTTLS, with ID like curl abort connections sending authentication data and CA-signed server certificate.
Prerequisites
- curl installed on your system
- CA-signed server certificate for the SMTP server
- SMTP server credentials (username and password)
Step 1: Install curl
Install curl on your system if it's not already installed.
Step 2: Configure curl for SMTP authentication
Create a file named smtp_config.sh with the following content:
#!/bin/bash
curl --url smtp.example.com:587 --insecure --sslv3 --user username:password --mail-from [email protected] --rcpt-to [email protected] --tlsv1.2 --starttls smtp --ssl --cert C:\path\to\cert.pem --key C:\path\to\key.pem
Replace smtp.example.com with your SMTP server's address, username and password with your SMTP server credentials, [email protected] with your email address, and provide the paths to the CA-signed server certificate (cert.pem) and key (key.pem).
Step 3: Make the script executable
Run the following command to make the script executable:
chmod +x smtp_config.sh
Step 4: Run the script
Run the script using the following command:
./smtp_config.sh
This article showed how to configure curl to establish an authenticated SMTP connection via STARTTLS with ID like curl abort connections sending authentication data and CA-signed server certificate.
References
- Book: curl: The Command-Line Tool
- Article: libcurl SMTP Session
- Online Resource: libcurl SSL Initialization