Java发送mail和C#发送mail

Java发送mail

阿里云邮箱，配置公司邮箱服务器，邮箱地址，授权码（运维同事提供，听说阿里云邮箱的授权码和密码一样），端口465，测试能发送。

/**
 * 发送简单的文本邮件
 */
public static boolean sendTextEmail(String to, String title, String msg) throws Exception {
    if (to.trim().equals("")) {
        return false;
    }
    try {
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(USERNAME, PERSONAL, DEFAULT_ENCODING));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to.trim()));
        message.setSubject(title);
        message.setText(msg);
        message.setSentDate(new Date());
        message.saveChanges();
        Transport trans = session.getTransport("smtp");
        trans.send(message);
    } catch (Exception e) {
        e.printStackTrace();
        return false;
    }
    return true;
}

　　

　　C#发送邮箱

跟上面配一样的公司邮箱服务器，邮箱地址，授权码（运维同事提供，听说阿里云邮箱的授权码和密码一样），端口465，测试发送失败。

改成自己的QQ邮箱地址及服务器，授权码，端口仍是465，依然失败，网上查了说是net.mail不支持ssl加密发送；

再次尝试，改成Web.mail方式发送，QQ邮箱smtpusessl=true，端口465，成功，代码如下；smtpusessl=false，端口25，也成功，这个代码就放了，就改两处。

            //发件人
            const string sendAddress = "xxxx@qq.com";
            //发件人密码
            const string sendPassword = "xxxx";
            //收件人
            const string receiveAddress = "xxxx@xxxxx.com";
            //服务器
            const string host = "smtp.qq.com";

            System.Web.Mail.MailMessage mail = new System.Web.Mail.MailMessage();
            try
            {
                mail.From = sendAddress;
                mail.To = receiveAddress;
                mail.Subject = "测试";
                mail.BodyFormat = System.Web.Mail.MailFormat.Html;
                mail.Body = "dxd发送的测试邮件" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

                mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1"); //basic authentication
                mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", sendAddress); //set your username here 发件人邮箱
                mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", sendPassword); //set your password here 发件人邮箱密码
                mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", 465);//发送端口号
                mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", "true");//是否启用ssl

                //需要引用组件System.Web
                System.Web.Mail.SmtpMail.SmtpServer = host;
                System.Web.Mail.SmtpMail.Send(mail);

                Console.WriteLine("发送邮件成功");
            }
            catch (Exception ex)
            {
                var exg = ex.InnerException ?? ex;
                string msg = exg.ToString();
                Console.WriteLine(msg);
            }

改成公司的邮箱配置，smtpusessl=false，端口25，也成功；smtpusessl=true，端口465，失败，很费解；

Web.mail，公司的邮箱配置，smtpusessl=false，端口25，不是到阿里云服务器，测试，发送失败，网上查了说是阿里云25端口被禁，可以申请解禁，流程好像比较麻烦。

改成465，仍然失败，修改smtpusessl=true，仍然失败。

正当一筹莫展时，看到之前net.mail发送端口配的是587，尝试改成net,mail发送，仍然用公司的邮箱配置，EnableSsl = false，端口改成587，居然成功了；

再次尝试，把EnableSsl = true，测试失败，提示：根据验证过程，远程证书无效，网上查了：http://t.zoukankan.com/yifengjianbai-p-6128396.html，

说要加一段代码：

ServicePointManager.ServerCertificateValidationCallback =
                    delegate(Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; };

加上再次测试，成功，完全体代码如下：

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;

namespace RNCloud
{
    public class MailHelper
    {
        private static string host = ConfigurationManager.AppSettings["email:host"];
        private static string port = ConfigurationManager.AppSettings["email:port"];
        private static string username = ConfigurationManager.AppSettings["email:username"] ;
        private static string password = ConfigurationManager.AppSettings["email:password"];
        #region Net.Email发送
        /// <summary>
        /// 发送电子邮件邮件
        /// </summary>
        /// <param name="to">接收电子邮件地址</param>
        /// <param name="bcc">暗送电子邮件地址，可为空</param>
        /// <param name="cc">抄送电子邮件地址，可为空</param>
        /// <param name="subject">邮件主题</param>
        /// <param name="body">邮件正文</param>
        /// <param name="mailatta">附件</param>
        /// <param name="bodyType">邮件正文格式</param>
        public static void SendNetMail(string[] to, string[] bcc, string[] cc, string subject, string body, System.Net.Mail.Attachment mailatta, string bodyType)
        {
            System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient();
            smtpClient.EnableSsl = true;
            smtpClient.UseDefaultCredentials = false;
            smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;//指定电子邮件发送方式
            smtpClient.Host = host; //指定SMTP服务器
            smtpClient.Port = port.ToInt();//指定SMTP端口
            smtpClient.Credentials = new System.Net.NetworkCredential(username, password);//用户名和密码

            System.Net.Mail.MailMessage m_Mail = new System.Net.Mail.MailMessage();
            //邮件编码
            m_Mail.BodyEncoding = System.Text.Encoding.UTF8;
            //设置发件人
            System.Net.Mail.MailAddress fromAddr = new System.Net.Mail.MailAddress(username);
            m_Mail.From = fromAddr;
            //收件人
            if (to != null)
                foreach (string s_to in to)
                {
                    m_Mail.To.Add(s_to);
                }
            //秘密抄送人
            if (bcc != null)
                foreach (string s_bcc in bcc)
                {
                    m_Mail.Bcc.Add(s_bcc);
                }
            //抄送人
            if (cc != null)
                foreach (string s_cc in cc)
                {
                    m_Mail.CC.Add(s_cc);
                }
            //定义邮件的主题
            m_Mail.Subject = subject;
            //定义邮件的主体
            m_Mail.Body = body;
            //'邮件以 HTML的格式发送
            m_Mail.IsBodyHtml = bodyType.Equals("html");
            //定义邮件的优先级，在此设定为高
            m_Mail.Priority = System.Net.Mail.MailPriority.High;
            //  给发送的邮件附加上一个附件
            if (mailatta != null)
            {
                m_Mail.Attachments.Add(mailatta);
            }
            try
            {
                //加这段之前用公司邮箱发送报错：根据验证过程，远程证书无效
                //加上后解决问题
                ServicePointManager.ServerCertificateValidationCallback =
                    delegate(Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; };
                smtpClient.Send(m_Mail);
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        public static void SendNetMail(string to, string subject, string text)
        {
            SendNetMail(new string[] { to }, null, null, subject, text, null, "html");
        }
        #endregion
    }
}

记录下尝试的过程，防止忘记，再次感谢：http://t.zoukankan.com/yifengjianbai-p-6128396.html