Newsletter signup flow with Email Verification API, Gmail & Google Sheets tracking

Newsletter Sign-up with Email Verification & Welcome Email Automation

📋 Description

A complete, production-ready newsletter automation workflow that validates email addresses, sends personalized welcome emails, and maintains comprehensive logs in Google Sheets. Perfect for marketing teams, content creators, and businesses looking to build high-quality email lists with minimal manual effort.

✨ Key Features

Email Verification - Real-time validation using Verifi Email API - Checks email format (RFC compliance) - Verifies domain existence and MX records - Detects disposable/temporary email addresses - Identifies potential spoofed emails

Automated Welcome Emails - Personalized HTML emails with subscriber's first name - Beautiful, mobile-responsive design with gradient headers - Branded confirmation and unsubscribe links - Sent via Gmail (or SMTP) automatically to valid subscribers

Smart Data Handling - Comprehensive logging to Google Sheets with three separate tabs - Handles incomplete submissions gracefully - Preserves original user data throughout verification process - Tracks source attribution for multi-channel campaigns

Error Management - Automatic retry logic on API failures - Separate logging for different error types - Detailed technical reasons for invalid emails - No data loss with direct webhook referencing