c#发送邮件的简单封装类

/// <summary>
/// 用于使用SMTP发送电子邮件的辅助类。
/// </summary>
public static class EmailHelper
{
    static SmtpClient _smtp;
    static MailMessage _message;

    /// <summary>
    /// 初始化发送电子邮件的设置。
    /// </summary>
    /// <param name="smtpServer">SMTP服务器地址。</param>
    /// <param name="smtpPort">SMTP服务器端口。</param>
    /// <param name="senderName">发件人电子邮件地址。</param>
    /// <param name="senderPassword">发件人电子邮件密码。</param>
    /// <param name="recipientEmail">收件人电子邮件地址。</param>
    /// <param name="ccEmails">可选的抄送电子邮件地址。</param>
    public static void InitEmailSetting(string smtpServer, int smtpPort, string senderName, string senderPassword,
        string recipientEmail, params string[] ccEmails)
    {
        _smtp = new SmtpClient(smtpServer, smtpPort);
        _smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
        //  _smtp.EnableSsl = true;
        _smtp.Credentials = new NetworkCredential(senderName, senderPassword);
        _message = new MailMessage();
        _message.From = new MailAddress(senderName);
        _message.To.Add(new MailAddress(recipientEmail));
        _message.BodyEncoding = Encoding.UTF8;
        _message.IsBodyHtml = true;

        if (ccEmails != null && ccEmails.Length > 0)
        {
            foreach (var ccEmail in ccEmails)
            {
                _message.CC.Add(new MailAddress(ccEmail));
            }
        }
    }

    /// <summary>
    /// 发送具有指定主题、内容和可选附件的电子邮件。
    /// </summary>
    /// <param name="subjectPrefix">电子邮件的主题前缀。</param>
    /// <param name="emailContext">电子邮件内容。</param>
    /// <param name="attachmentFilePaths">附件文件路径（可选）。</param>
    /// <returns>如果成功发送电子邮件，则返回true。</returns>
    public static bool SendMail(string subjectPrefix, string emailContext, params string[] attachmentFilePaths)
    {
        try
        {
            if (_smtp == null || _message == null)
            {
                throw new Exception("调用SendMail前，需要调用InitEmailSetting");
            }
            _message.Subject = $"{subjectPrefix}";

            if (attachmentFilePaths.Length > 0)
            {
                foreach (var file in attachmentFilePaths)
                {
                    if (File.Exists(file))
                    {
                        Attachment attachment = new Attachment(file, MediaTypeNames.Application.Octet);
                        attachment.ContentDisposition.CreationDate = File.GetCreationTime(file);
                        attachment.ContentDisposition.ModificationDate = File.GetLastWriteTime(file);
                        attachment.ContentDisposition.ReadDate = File.GetCreationTime(file);
                        _message.Attachments.Add(attachment);
                    }
                }
            }

            _message.Body = $"{emailContext}";
            //在代码中临时禁用证书验证。使用SmtpClient的ServerCertificateValidationCallback属性，设置一个返回true的回调方法来忽略证书验证错误。
            ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true;
            _smtp.Send(_message);
            return true;
        }
        catch (Exception ex)
        {
            throw ex;
        }
        finally
        {
            _message.Dispose();
            _smtp.Dispose();
        }
    }
}