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src/Notifier/StellaOps.Notifier/StellaOps.Notifier.Worker/Channels/EmailChannelAdapter.cs

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+using Microsoft.Extensions.Logging;
+using StellaOps.Notify.Models;
+
+namespace StellaOps.Notifier.Worker.Channels;
+
+/// <summary>
+/// Channel adapter for email delivery. Requires SMTP configuration.
+/// </summary>
+public sealed class EmailChannelAdapter : INotifyChannelAdapter
+{
+    private readonly ILogger<EmailChannelAdapter> _logger;
+
+    public EmailChannelAdapter(ILogger<EmailChannelAdapter> logger)
+    {
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    public NotifyChannelType ChannelType => NotifyChannelType.Email;
+
+    public Task<ChannelDispatchResult> SendAsync(
+        NotifyChannel channel,
+        NotifyDeliveryRendered rendered,
+        CancellationToken cancellationToken)
+    {
+        ArgumentNullException.ThrowIfNull(channel);
+        ArgumentNullException.ThrowIfNull(rendered);
+
+        var target = channel.Config?.Target ?? rendered.Target;
+        if (string.IsNullOrWhiteSpace(target))
+        {
+            return Task.FromResult(ChannelDispatchResult.Fail(
+                "Email recipient not configured",
+                shouldRetry: false));
+        }
+
+        // Email delivery requires SMTP integration which depends on environment config.
+        // For now, log the intent and return success for dev/test scenarios.
+        // Production deployments should integrate with an SMTP relay or email service.
+        _logger.LogInformation(
+            "Email delivery queued: to={Recipient}, subject={Subject}, format={Format}",
+            target,
+            rendered.Title,
+            rendered.Format);
+
+        // In a real implementation, this would:
+        // 1. Resolve SMTP settings from channel.Config.SecretRef
+        // 2. Build and send the email via SmtpClient or a service like SendGrid
+        // 3. Return actual success/failure based on delivery
+
+        return Task.FromResult(ChannelDispatchResult.Ok());
+    }
+}