اتصال به ایمیل‌سرور در برنامه‌های NET.

MAIL_HOST=smtp.c1.liara.email
MAIL_PORT=465
MAIL_USER=hopeful_zhukovsky_9daqpv
MAIL_PASSWORD=fbef30d7-f852-428e-9573-bc73381c7d4d
MAIL_FROM_ADDRESS=info@example.com

dotnet add package MailKit

using MailKit.Net.Smtp;
using MimeKit;

var builder = WebApplication.CreateBuilder(args);

// Load environment variables
var smtpHost = Environment.GetEnvironmentVariable("MAIL_HOST") ?? "smtp.c1.liara.email";
var smtpPort = int.Parse(Environment.GetEnvironmentVariable("MAIL_PORT") ?? "465");
var smtpUser = Environment.GetEnvironmentVariable("MAIL_USER") ?? "";
var smtpPassword = Environment.GetEnvironmentVariable("MAIL_PASSWORD") ?? "";
var mailFromAddress = Environment.GetEnvironmentVariable("MAIL_FROM_ADDRESS") ?? "";

var app = builder.Build();

app.MapGet("/", async context =>
{
    var recipientEmail = "recipient@example.com"; // Replace with recipient email

    // Create the email
    var email = new MimeMessage();
    email.From.Add(MailboxAddress.Parse(mailFromAddress));
    email.To.Add(MailboxAddress.Parse(recipientEmail));
    email.Subject = "Test Email";
    email.Body = new TextPart("plain")
    {
        Text = "This is a test email sent using explicit TLS without STARTTLS."
    };

    // Add custom header
    email.Headers.Add("x-liara-tag", "test-tag");

    try
    {
        // Send the email
        using var client = new SmtpClient();
        await client.ConnectAsync(smtpHost, smtpPort, MailKit.Security.SecureSocketOptions.SslOnConnect);
        await client.AuthenticateAsync(smtpUser, smtpPassword);
        await client.SendAsync(email);
        await client.DisconnectAsync(true);

        // Respond to the client
        await context.Response.WriteAsync("Email sent successfully with custom header!");
    }
    catch (Exception ex)
    {
        // Handle errors and respond to the client
        await context.Response.WriteAsync($"Failed to send email: {ex.Message}");
    }
});

app.Run();

using MailKit.Net.Smtp;
using MimeKit;
using Microsoft.AspNetCore.Mvc;

namespace EmailSenderApp.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class EmailController : ControllerBase
    {
        // Load environment variables (or use default values)
        private readonly string smtpHost = Environment.GetEnvironmentVariable("MAIL_HOST") ?? "smtp.c1.liara.email";
        private readonly int smtpPort = int.Parse(Environment.GetEnvironmentVariable("MAIL_PORT") ?? "465");
        private readonly string smtpUser = Environment.GetEnvironmentVariable("MAIL_USER") ?? "";
        private readonly string smtpPassword = Environment.GetEnvironmentVariable("MAIL_PASSWORD") ?? "";
        private readonly string mailFromAddress = Environment.GetEnvironmentVariable("MAIL_FROM_ADDRESS") ?? "";

        [HttpGet("send-test-email")]
        public async Task<IActionResult> SendTestEmail()
        {
            var recipientEmail = "recipient@example.com"; // Replace with recipient email

            // Create the email
            var email = new MimeMessage();
            email.From.Add(MailboxAddress.Parse(mailFromAddress));
            email.To.Add(MailboxAddress.Parse(recipientEmail));
            email.Subject = "Test Email";
            email.Body = new TextPart("plain")
            {
                Text = "This is a test email sent using explicit TLS without STARTTLS."
            };

            // Add custom header
            email.Headers.Add("x-liara-tag", "test-tag");

            try
            {
                // Send the email
                using var client = new SmtpClient();
                await client.ConnectAsync(smtpHost, smtpPort, MailKit.Security.SecureSocketOptions.SslOnConnect);
                await client.AuthenticateAsync(smtpUser, smtpPassword);
                await client.SendAsync(email);
                await client.DisconnectAsync(true);

                // Return success response
                return Ok("Email sent successfully with custom header!");
            }
            catch (Exception ex)
            {
                // Handle errors and return error response
                return StatusCode(500, $"Failed to send email: {ex.Message}");
            }
        }
    }
}