raven/server/AyaNova/util/Mailer.cs

using MailKit.Net.Smtp;
using MimeKit;
using System;
using System.Threading.Tasks;
using MimeKit.Text;

namespace AyaNova.Util
{
    public interface IMailer
    {
        Task SendEmailAsync(string email, string subject, string body, AyaNova.Models.GlobalOpsNotificationSettings smtpSettings, string bodyHTML = null);
    }

    public class Mailer : IMailer
    {
        public Mailer()
        {

        }

        public async Task SendEmailAsync(string email, string subject, string body, AyaNova.Models.GlobalOpsNotificationSettings smtpSettings, string bodyHTML = null)
        {
            try
            {
                var message = new MimeMessage();
                message.From.Add(new MailboxAddress(smtpSettings.NotifyFromAddress, smtpSettings.NotifyFromAddress));
                message.To.Add(MailboxAddress.Parse(email));
                message.Subject = subject;
                if (!string.IsNullOrWhiteSpace(body))
                    message.Body = new TextPart(TextFormat.Plain) { Text = body };
                if (!string.IsNullOrWhiteSpace(bodyHTML))
                    message.Body = new TextPart("html")
                    {
                        Text = body
                    };

                using (var client = new SmtpClient())
                {
                    client.ServerCertificateValidationCallback = (s, c, h, e) => true;

                    bool UseSSL = smtpSettings.ConnectionSecurity != Biz.NotifyMailSecurity.None;
                    await client.ConnectAsync(smtpSettings.SmtpServerAddress, smtpSettings.SmtpServerPort, UseSSL);


                    await client.AuthenticateAsync(smtpSettings.SmtpAccount, smtpSettings.SmtpPassword);
                    await client.SendAsync(message);
                    await client.DisconnectAsync(true);
                }
            }
            catch (Exception e)
            {
                throw new InvalidOperationException(e.Message);
            }
        }
    }
}