Email API 和 SMTP 哪个适合我？SendGrid 多语言开发集成指南

from sendgrid import SendGridAPIClient
from sendgrid.helpers.mail import Mail

message = Mail(
    from_email='sender@example.com',
    to_emails='recipient@example.com',
    subject='Sending with SendGrid is Fun',
    plain_text_content='and easy to do anywhere, even with Python')

try:
    sg = SendGridAPIClient(api_key='你的 API 密钥')
    response = sg.send(message)
    print(response.status_code)
    print(response.body)
    print(response.headers)
except Exception as e:
    print(e.message)

html_content = '
and easy to do anywhere, even with Python
'
message = Mail(
    from_email='sender@example.com',
    to_emails='recipient@example.com',
    subject='Sending with SendGrid is Fun',
    html_content=html_content)

<dependency>
    <groupId>com.sendgridgroupId>
    <artifactId>sendgrid-javaartifactId>
    <version>4.9.1version>
dependency>

import com.sendgrid.*;
import com.sendgrid.helpers.mail.*;

public class SendEmail {
    public static void main(String[] args) {
        SendGrid sg = new SendGrid("你的 API 密钥");
        Email from = new Email("sender@example.com");
        String subject = "Sending with SendGrid is Fun";
        Email to = new Email("recipient@example.com");
        Content content = new Content("text/plain", "and easy to do anywhere, even with Java");
        Mail mail = new Mail(from, subject, to, content);

        Request request = new Request();
        try {
            request.setMethod(Method.POST);
            request.setEndpoint("mail/send");
            request.setBody(mail.build());
            Response response = sg.api(request);
            System.out.println(response.getStatusCode());
            System.out.println(response.getBody());
            System.out.println(response.getHeaders());
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
    }
}

const sgMail = require('@sendgrid/mail');
sgMail.setApiKey('你的 API 密钥');

const msg = {
  to: 'recipient@example.com',
  from: 'sender@example.com',
  subject: 'Sending with SendGrid is Fun',
  text: 'and easy to do anywhere, even with Node.js',
  html: '
and easy to do anywhere, even with Node.js
',
};

sgMail.send(msg).then((response) => {
  console.log(response[].statusCode);
  console.log(response[].headers);
}).catch((error) => {
  console.error(error);
});

using SendGrid;
using SendGrid.Helpers.Mail;
using System;

class Program
{
    static void Main()
    {
        var client = new SendGridClient("你的 API 密钥");
        var from = new EmailAddress("sender@example.com", "发件人名称");
        var to = new EmailAddress("recipient@example.com", "收件人名称");
        var subject = "Sending with SendGrid is Fun";
        var content = new Content("text/plain", "and easy to do anywhere, even with C#");
        var msg = MailHelper.CreateSingleEmail(from, to, subject, content, null);

        var response = client.SendEmailAsync(msg).Result;
        Console.WriteLine(response.StatusCode);
        Console.WriteLine(response.Body.ReadAsStringAsync().Result);
        Console.WriteLine(response.Headers);
    }
}