async fn send_email(
    mailer: &lettre::AsyncSmtpTransport<lettre::Tokio1Executor>,
    mailer_from: &lettre::message::Mailbox,
    token_url: String,
    to: &str,
) -> Result<(), Box<dyn std::error::Error>> {
    let email = lettre::Message::builder()
        .from(mailer_from.clone())
        .to(to.parse()?)
        .subject("FreeOrion reset game password link")
        .body(format!(
            "You requested change for FreeOrion game password.\n\
                      Use next link {} to enter new password. Link is active for 24 hours.\n\
                        Don't send it to other people.",
            token_url
        ))?;
    use lettre::AsyncTransport;
    mailer.send(email).await?;
    Ok(())
}

    if let Err(e) = send_email(&data.mailer, &data.mailer_from, token_url, &form.contact).await {
        log::error!("Cann't send email: {}", e);
        return HttpResponse::ServiceUnavailable().body(actix_web::body::None::new());
    }

    pub mailer: lettre::AsyncSmtpTransport<lettre::Tokio1Executor>,
    pub mailer_from: lettre::message::Mailbox,

        mail,

        ..

    let smtp_credentials =
        lettre::transport::smtp::authentication::Credentials::new(mail.login, mail.passwd);

        mailer: lettre::AsyncSmtpTransport::<lettre::Tokio1Executor>::relay(&mail.server)
            .expect("Mail relay server")
            .credentials(smtp_credentials)
            .build(),
        mailer_from: lettre::message::Mailbox::new(
            None,
            mail.from
                .parse::<lettre::address::Address>()
                .expect("Mail from address"),
        ),

features = ["hostname", "tokio1-rustls-tls", "smtp-transport"]

features = ["hostname", "tokio1", "tokio1-rustls-tls", "smtp-transport", "builder"]

name = "email-encoding"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6690291166824e467790ac08ba42f241791567e8337bbf00c5a6e87889629f98"
dependencies = [
 "base64",
]
[[package]]

name = "fastrand"
version = "1.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c3fcf0cee53519c866c09b5de1f6c56ff9d647101f81c1964fa632e148896cdf"
dependencies = [
 "instant",
]
[[package]]

 "email-encoding",
 "fastrand",

 "httpdate",

 "mime",

 "quoted_printable",

name = "quoted_printable"
version = "0.4.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3fee2dce59f7a43418e3382c766554c614e06a552d53a8f07ef499ea4b332c0f"
[[package]]