A simple Java utility that reads contact data from a JSON file, sends emails via SMTP, and updates the contact list with timestamps and status flags.

• Reads a structured contact list from contacts.json
• Sends personalized emails to each contact using an SMTP server
• Updates:
  • wasMessageSent → true
  • lastContacted → current date and time
• Supports SMTP authentication (e.g., Mailgun, Gmail SMTP relay)
• Writes updated JSON back to the same file

• Java 11+
• Maven 3.6+
• Valid SMTP credentials (username, password, and host)

git clone
cd email-sender-app