graph LR
AnymailBaseBackend["AnymailBaseBackend"]
AnymailRequestsBackend["AnymailRequestsBackend"]
Concrete_ESP_Backends["Concrete ESP Backends"]
ESP_Specific_Payload_Classes["ESP-Specific Payload Classes"]
AnymailBaseBackend -- "is inherited by" --> AnymailRequestsBackend
AnymailRequestsBackend -- "is inherited by" --> Concrete_ESP_Backends
AnymailBaseBackend -- "is inherited by" --> Concrete_ESP_Backends
Concrete_ESP_Backends -- "uses" --> ESP_Specific_Payload_Classes
The anymail.backends subsystem provides a robust and extensible framework for integrating Django applications with various Email Service Providers. It is anchored by the AnymailBaseBackend, which establishes a universal interface for email sending. This base is extended by AnymailRequestsBackend, centralizing HTTP communication logic for web-API-driven ESPs. Building upon these, Concrete ESP Backends implement the unique API interactions for specific providers, acting as adapters that translate generic email messages into ESP-specific formats. These concrete backends, in turn, rely on ESP-Specific Payload Classes to meticulously construct the data payloads required by each provider's API, ensuring accurate and efficient email delivery. This modular design facilitates easy integration of new ESPs and maintains a consistent, high-level abstraction for email dispatch.
Serves as the abstract base class for all Anymail backends. It defines the fundamental contract for email sending, including common message validation and the overall email dispatch lifecycle. It acts as the entry point for the Strategy/Plugin pattern, allowing different ESP implementations to be seamlessly integrated.
Related Classes/Methods: None
An abstract class that extends AnymailBaseBackend, providing common HTTP request handling for most web-API-based ESPs. It centralizes logic for creating and managing requests.Session objects, posting data to API endpoints, handling HTTP-level errors, and deserializing JSON responses.
Related Classes/Methods:
These are concrete implementations, each tailored to send emails through a specific Email Service Provider. They encapsulate the unique API interactions, including authentication, endpoint specifics, and response parsing for their respective ESPs. They embody the Adapter pattern, translating the generic Anymail message into the specific format required by the ESP.
Related Classes/Methods: None
These internal classes or methods, typically associated with a Concrete ESP Backend, are responsible for structuring the exact data payload required by the respective ESP's API. They ensure that email data (recipients, subject, body, attachments, etc.) is correctly formatted according to each provider's specific API documentation.
Related Classes/Methods: None