Rust send mail（发送邮件）

如何在rust中发送邮件？OK，我们会用到下面两个第三方依赖：

• lettre
• lettre_email

step1 (add dependencies)

[dependencies]
lettre = "0.8"
lettre_email = "0.8.0"

extern crate lettre;
extern crate lettre_email;

step2 (create EmailBuilder)

        let email = EmailBuilder::new()
        // Addresses can be specified by the tuple (email, alias)
        .to(("user@example.org", "Firstname Lastname"))
        // ... or by an address only
        .from("user@example.com")
        .subject("Hi, Hello world")
        .text("Hello world.")
        .attachment(Path::new("Cargo.toml"), None, &mime::TEXT_PLAIN).unwrap()
        .build()
        .unwrap();

step3 (create mailer)

        let mut mailer = SmtpTransport::simple_builder(domian).unwrap()
        .smtp_utf8(true)
        .hello_name(ClientId::Domain("localhost".to_string()))
        .credentials(Credentials::new(send_from.to_string(), passwd.to_string()))
        .smtp_utf8(true)
        .authentication_mechanism(Mechanism::Plain)
        .connection_reuse(ConnectionReuseParameters::ReuseUnlimited).build();

step4 (send & closed)

    let result = mailer.send(&email);
    if !result.is_ok() {
        println!("send_email() get error: {:#?}", result);
    }
    mailer.close();

完整代码

extern crate lettre;
extern crate lettre_email;

use lettre_email::EmailBuilder;
use lettre::smtp::authentication::{Credentials, Mechanism};
use lettre::smtp::extension::ClientId;
use lettre::EmailTransport;

use lettre::SmtpTransport;
use lettre::smtp::ConnectionReuseParameters;

fn main() {
    let send_to = vec!["xxx@qq.com", "xxx@sina.com"];
    let send_from = "xxx@sina.com";
    let passwd = "xxx";
    let subject = "mail subject";
    let body = "mail body test";
    let domian = "xxxxxx";//smtp.sina.com
    //=======

    let mut builder = EmailBuilder::new();
    for to in send_to {
        builder.add_to(to);
    }

    builder.add_from(send_from);
    builder.set_subject(subject);
    builder.set_body(body);
    let email = builder.build().unwrap();


    let mut mailer = SmtpTransport::simple_builder(domian).unwrap()
        .smtp_utf8(true)
        .hello_name(ClientId::Domain("localhost".to_string()))
        .credentials(Credentials::new(send_from.to_string(), passwd.to_string()))
        .smtp_utf8(true)
        .authentication_mechanism(Mechanism::Plain)
        .connection_reuse(ConnectionReuseParameters::ReuseUnlimited).build();

    let result = mailer.send(&email);
    if !result.is_ok() {
        println!("send_email() get error: {:#?}", result);
    }
    mailer.close();
}