Clivelancaster/Services/MailService.cs

using MailKit.Net.Smtp;
using MimeKit;
using Microsoft.Extensions.Options;

namespace clivelancaster.Services
{
    public class MailService
    {
        private readonly SmtpSettings _smtpSettings;

        public MailService(IOptions<SmtpSettings> smtpSettings)
        {
            _smtpSettings = smtpSettings.Value;
        }

        public async Task SendEmailAsync(string fromEmail, string fromName, string message)
        {
            var emailMessage = new MimeMessage();
            emailMessage.From.Add(new MailboxAddress(_smtpSettings.SenderName, _smtpSettings.SenderEmail));
            emailMessage.To.Add(new MailboxAddress(_smtpSettings.SenderName, _smtpSettings.SenderEmail)); // Send to yourself
            emailMessage.Subject = "Contact Form Message";

            emailMessage.Body = new TextPart("plain")
            {
                Text = $"From: {fromName} ({fromEmail})\n\nMessage:\n{message}"
            };

            using (var client = new SmtpClient())
            {
                await client.ConnectAsync(_smtpSettings.Server, _smtpSettings.Port, MailKit.Security.SecureSocketOptions.StartTls);
                await client.AuthenticateAsync(_smtpSettings.Username, _smtpSettings.Password);
                await client.SendAsync(emailMessage);
                await client.DisconnectAsync(true);
            }
        }
    }

    public class SmtpSettings
    {
        public required string Server { get; set; }
        public int Port { get; set; }
        public required string SenderName { get; set; }
        public required string SenderEmail { get; set; }
        public required string Username { get; set; }
        public required string Password { get; set; }
        public bool UseSSL { get; set; }
    }
}