Last updated: Jul 25, 2025, 10:08 AM UTC

Email System Fixes Summary

Generated: 2025-07-25 09:00 UTC
Status: Complete
Verified:

Overview

This document summarizes the email system fixes and documentation updates completed on 2025-07-25.

Issues Addressed

1. Email Delivery

  • Issue: Emails appeared to bounce but were actually being sent successfully
  • Root Cause: Gmail service account was properly configured in production via Secret Manager
  • Resolution: Added enhanced logging to track email delivery

2. Subject Line Encoding

  • Issue: Subject line displayed corrupted characters: "Your API Key Inside! 🎉"
  • Root Cause: UTF-8 encoding issue with emoji characters
  • Resolution:
    • Removed emojis from subject lines
    • Added proper RFC 2047 UTF-8 encoding: =?UTF-8?B?${base64}?=

3. Incorrect URLs in Emails

  • Issue: Email templates contained incorrect domain references
  • Root Cause: Mixed use of domains during development
  • Resolution: Updated all URLs to use correct domains:
    • API calls: https://convert-to-markdown.knowcode.tech
    • Documentation: https://convert-to-markdown.vercel.app

Changes Made

Email Template Updates

  1. Subject Lines:

    • Free tier: "Welcome to Convert To Markdown - Your API Key Inside!" (removed )
    • Pro tier: "Welcome to Convert To Markdown Pro!" (removed )

  2. API Endpoint URLs:

    • Changed FROM: https://api.convert-to-markdown.knowcode.tech/v1/...
    • Changed TO: https://convert-to-markdown.knowcode.tech/v1/...

  3. Documentation Links:

    • API docs: https://convert-to-markdown.vercel.app/api
    • Pricing: https://convert-to-markdown.vercel.app/pricing
    • Usage guide: https://convert-to-markdown.vercel.app/api#usage-api

Code Changes

  1. Enhanced Logging (lib/email-gmail-api.js):

    console.log('[EMAIL] Getting service account key...');
console.log('[EMAIL] Attempting to send welcome email to:', email);
console.log('[EMAIL] Successfully sent welcome email to', email);

  2. Subject Encoding:

    `Subject: =?UTF-8?B?${Buffer.from(subject).toString('base64')}?=`

  3. Error Handling:

    • Added try-catch blocks around email sending
    • Improved error logging with context

Documentation Updates

  1. Created Documents:

    • /docs/PRD/project-settings-constants.md - Central repository for all project constants
    • /docs/setup/email-troubleshooting-guide.md - Comprehensive troubleshooting guide
    • /docs/setup/email-fixes-summary.md - This summary document

  2. Updated Documents:

    • /docs/api.md - Updated URLs and added link to project settings
    • /CLAUDE.md - Added API endpoint information

Deployment Status

All changes have been deployed to production:

  • Function revision: convert-api-00018-mar
  • Deployment time: 2025-07-25 08:49:01 UTC
  • Status: Active and serving traffic

Verification Steps

  1. Email delivery is working correctly (confirmed via logs)
  2. Subject lines display properly without character corruption
  3. All links in emails point to correct domains
  4. API calls use the correct endpoint URL

Next Steps

  1. Monitor email delivery logs for any issues
  2. Test with various email providers to ensure compatibility
  3. Consider adding email preview functionality for testing
  4. Set up monitoring alerts for email delivery failures