# Mail Transport Agents

- SMTP authentication
- Standard bulk delivery
  - Chunking recipients
  - Bulk delivery
  - Delivery headers
  - Delivery failures
- MTA connections
  - Sessions per connection
  - No maximum
  - Development mode
- Personalized decoration
  - Decorations
  - Decorate only once
- Fully personalized delivery
  - No personalization
  - To header
- Standard VERP delivery
  - No recipients
  - Individual copy