# Stub transport :: Lettre site
Documentation for the Lettre mailer in Rust
Author: Alexis Mousset

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# Stub transport

The stub transport only logs message envelope and drops the content. It can be useful for testing purposes.

    extern crate lettre;

    use lettre::stub::StubEmailTransport;
    use lettre::{SimpleSendableEmail, EmailTransport};

    fn main() {
        let email = SimpleSendableEmail::new(
                        "user@localhost".to_string(),
                        &["root@localhost".to_string()],
                        "message_id".to_string(),
                        "Hello world".to_string(),
                    ).unwrap();

        let mut sender = StubEmailTransport::new_positive();
        let result = sender.send(&email);
        assert!(result.is_ok());
    }

Will log (when using a logger like `env_logger`):

    b7c211bc-9811-45ce-8cd9-68eab575d695: from=<user@localhost> to=<root@localhost>