Attribute Macro on_unknown 

#[on_unknown]

Generates a callback function of type UnknownCallback that delegates to the annotated function.

As its sole argument on_unknown takes an identifier to be used as the name of the generated function.

The on_unknown callback is called for unknown SMTP commands. The signature of the annotated function must be as specified below.

Arguments:

• Context<T> – the callback context
• &str – the SMTP command

Return type:

• Status – the response status

Examples

use milter::{Context, Status};

#[on_unknown(unknown_callback)]
fn handle_unknown(context: Context<MyData>, smtp_cmd: &str) -> Status {
    Status::Continue
}