// include the latest version of the regex crate in your Cargo.toml
extern crate regex;
use regex::Regex;
fn main() {
let regex = Regex::new(r"(?m)(^References:|\G(?!\A)).*?@\Kdomain-a\.com").unwrap();
let string = "References: <mail-1@domain-a.com> <mail-2@domain-a.com> <mail-3@domain-a.com>
Another-Header: <example@domain-a.com>
";
let substitution = "domain-b.com";
// result will be a String with the substituted value
let result = regex.replace_all(string, substitution);
println!("{}", result);
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/