Function email_parser::parser::parse_message_with_separators

pub fn parse_message_with_separators(
    data: &[u8]
) -> Result<(Vec<(&[u8], &[u8], &[u8])>, Option<&[u8]>), ()>

Like parse_message() but headers are a tuple of three values: (name, separator, value).

Example: "HeaderName : header value\r\n" gives ("HeaderName", " :", "header value")