fix: Resolve Exchange email server self-signed certificate error
- Add TLS configuration to accept self-signed certificates - Disable TLS/STARTTLS for port 25 when SMTP_SECURE=false - Add ignoreTLS option for Exchange servers on port 25 - Update .env.example with Exchange-specific configuration - Create comprehensive EMAIL_CONFIGURATION.md guide - Support both Exchange internal servers and modern SMTP servers This fixes the "self-signed certificate" error when connecting to Microsoft Exchange servers on port 25 without TLS. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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@@ -23,11 +23,18 @@ MINIO_ACCESS_KEY=minioadmin
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MINIO_SECRET_KEY=minioadmin
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# Email Configuration (for reports)
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SMTP_HOST=smtp.gmail.com
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SMTP_PORT=587
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# For Microsoft Exchange on port 25 without TLS:
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SMTP_HOST=exchange.yourcompany.com
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SMTP_PORT=25
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SMTP_SECURE=false
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SMTP_USER=your-email@gmail.com
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SMTP_PASS=your-app-password
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SMTP_USER=username
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SMTP_PASS=password
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# For Gmail/Office365 with STARTTLS:
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# SMTP_HOST=smtp.gmail.com
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# SMTP_PORT=587
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# SMTP_SECURE=false
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# SMTP_USER=your-email@gmail.com
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# SMTP_PASS=your-app-password
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REPORT_RECIPIENT=info@example.com
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REPORT_SENDER=kopiabackup@example.com
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@@ -0,0 +1,194 @@
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# Email Configuration Guide for MinIO WebUI
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## Overview
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MinIO WebUI supports email notifications for storage reports. This guide explains how to configure email settings, especially for Microsoft Exchange servers.
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## Environment Variables
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Configure these variables in your `.env` file:
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```bash
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# SMTP Server Configuration
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SMTP_HOST=your-exchange-server.com
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SMTP_PORT=25
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SMTP_SECURE=false
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SMTP_USER=your-username
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SMTP_PASS=your-password
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# Email Settings
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REPORT_SENDER=minio-reports@yourdomain.com
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REPORT_RECIPIENT=admin@yourdomain.com
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# Report Schedule (cron format)
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REPORT_SCHEDULE=0 0 * * 1 # Every Monday at midnight
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```
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## Port and Security Settings
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### Port 25 (No TLS/SSL)
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Most common for internal Exchange servers:
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```bash
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SMTP_PORT=25
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SMTP_SECURE=false
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```
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### Port 587 (STARTTLS)
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For servers that support encryption:
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```bash
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SMTP_PORT=587
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SMTP_SECURE=false # STARTTLS will upgrade the connection
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```
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### Port 465 (SSL/TLS)
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For servers requiring SSL from the start:
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```bash
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SMTP_PORT=465
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SMTP_SECURE=true
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```
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## Common Issues and Solutions
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### Self-Signed Certificate Error
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**Error**: `self-signed certificate`
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**Solution**: The application is configured to accept self-signed certificates. If you still see this error:
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1. Ensure `SMTP_SECURE=false` for port 25
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2. Restart the backend service
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3. Check that your Exchange server allows SMTP connections on port 25
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### Connection Refused
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**Error**: `connect ECONNREFUSED`
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**Solution**:
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1. Verify the SMTP_HOST is correct
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2. Check if port 25 is open on the Exchange server
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3. Ensure no firewall is blocking the connection
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### Authentication Failed
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**Error**: `Invalid login`
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**Solution**:
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1. Verify SMTP_USER and SMTP_PASS are correct
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2. For Exchange, use either:
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- Username only: `username`
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- Domain\Username: `DOMAIN\\username`
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- Email format: `username@domain.com`
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## Exchange Server Specific Settings
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For Microsoft Exchange servers, the configuration automatically:
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- Accepts self-signed certificates when `SMTP_SECURE=false`
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- Disables TLS for port 25 when `SMTP_SECURE=false`
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- Handles STARTTLS negotiation for port 587
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## Testing Email Configuration
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1. Set up your environment variables
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2. Restart the backend:
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```bash
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docker-compose restart backend
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```
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3. Check the logs:
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```bash
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docker logs minio-webui-backend -f
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```
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4. Look for either:
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- ✅ `Email transporter ready`
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- ❌ `Email transporter verification failed`
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## Manual Test
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To manually trigger a test email:
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1. Log into the MinIO WebUI
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2. Navigate to Reports
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3. Click "E-Mail senden" (Send Email)
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## Report Schedule Format
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The `REPORT_SCHEDULE` uses cron format:
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```
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┌────────────── second (optional)
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│ ┌──────────── minute
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│ │ ┌────────── hour
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│ │ │ ┌──────── day of month
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│ │ │ │ ┌────── month
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│ │ │ │ │ ┌──── day of week
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│ │ │ │ │ │
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* * * * * *
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```
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Examples:
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- `0 0 * * 1` - Every Monday at midnight
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- `0 8 * * *` - Every day at 8 AM
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- `0 0 1 * *` - First day of every month at midnight
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- `0 */6 * * *` - Every 6 hours
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## Troubleshooting
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### Enable Debug Logging
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Add to your `.env`:
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```bash
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LOG_LEVEL=debug
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```
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### Check Email Service Status
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```bash
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# View recent logs
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docker logs minio-webui-backend --tail 50
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# Watch logs in real-time
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docker logs minio-webui-backend -f
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```
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### Common Exchange Configurations
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**Internal Exchange (No Auth)**:
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```bash
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SMTP_HOST=exchange.internal.company.com
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SMTP_PORT=25
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SMTP_SECURE=false
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SMTP_USER=
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SMTP_PASS=
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```
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**Exchange with Auth**:
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```bash
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SMTP_HOST=mail.company.com
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SMTP_PORT=25
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SMTP_SECURE=false
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SMTP_USER=DOMAIN\\username
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SMTP_PASS=yourpassword
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```
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**Office 365**:
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```bash
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SMTP_HOST=smtp.office365.com
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SMTP_PORT=587
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SMTP_SECURE=false
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SMTP_USER=user@company.com
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SMTP_PASS=yourpassword
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```
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## Security Considerations
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1. Store credentials securely in `.env` file
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2. Never commit `.env` to version control
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3. Use application-specific passwords when available
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4. Consider using OAuth2 for modern email services
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5. Restrict SMTP relay access on Exchange server
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## Need Help?
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If email configuration continues to fail:
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1. Verify with your IT team that SMTP is enabled on the Exchange server
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2. Check if any additional authentication (like NTLM) is required
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3. Test connectivity: `telnet your-exchange-server 25`
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4. Review Exchange server logs for connection attempts
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@@ -27,6 +27,15 @@ class ReportService {
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user: config.email.auth.user,
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pass: config.email.auth.pass,
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},
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// For Exchange Server on port 25 without TLS
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tls: {
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rejectUnauthorized: false, // Accept self-signed certificates
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// If you want to disable TLS completely when secure is false:
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...(config.email.port === 25 && !config.email.secure ? { enabled: false } : {})
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},
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// Disable STARTTLS for port 25 if not using secure
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requireTLS: config.email.secure,
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ignoreTLS: config.email.port === 25 && !config.email.secure,
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});
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// Verify connection
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