diff --git a/src/core/DigitalData.MessagingService.Abstraction/EmailAttachmentContext.cs b/src/core/DigitalData.MessagingService.Abstraction/EmailAttachmentContext.cs
new file mode 100644
index 0000000..720d87d
--- /dev/null
+++ b/src/core/DigitalData.MessagingService.Abstraction/EmailAttachmentContext.cs
@@ -0,0 +1,45 @@
+namespace DigitalData.MessagingService.Abstraction;
+
+/// <summary>
+/// Represents a single email attachment.
+/// </summary>
+public sealed class EmailAttachmentContext
+{
+    /// <summary>
+    /// Display name of the attachment (e.g. "invoice.pdf").
+    /// </summary>
+#if NETFRAMEWORK
+    public string FileName { get; set; } = null!;
+#else
+    public required string FileName { get; init; }
+#endif
+
+    /// <summary>
+    /// Raw content of the attachment.
+    /// </summary>
+#if NETFRAMEWORK
+    public byte[] Content { get; set; } = null!;
+#else
+    public required byte[] Content { get; init; }
+#endif
+
+    /// <summary>
+    /// MIME content-type (e.g. "application/pdf", "image/png").
+    /// Defaults to "application/octet-stream" when not specified.
+    /// </summary>
+    public string ContentType { get; set; } = "application/octet-stream";
+
+    /// <summary>
+    /// When <see langword="true"/> the attachment is embedded inline and displayed
+    /// directly inside the email body via a CID reference (e.g. &lt;img src="cid:logo"&gt;).
+    /// When <see langword="false"/> (default) it appears as a regular downloadable attachment.
+    /// </summary>
+    public bool IsInline { get; set; } = false;
+
+    /// <summary>
+    /// Content-ID used when <see cref="IsInline"/> is <see langword="true"/>.
+    /// Reference it in HTML body as <c>cid:{ContentId}</c>.
+    /// Auto-generated from <see cref="FileName"/> when left empty.
+    /// </summary>
+    public string? ContentId { get; set; }
+}
diff --git a/src/core/DigitalData.MessagingService.Abstraction/EmailContext.cs b/src/core/DigitalData.MessagingService.Abstraction/EmailContext.cs
index 65d6127..919e444 100644
--- a/src/core/DigitalData.MessagingService.Abstraction/EmailContext.cs
+++ b/src/core/DigitalData.MessagingService.Abstraction/EmailContext.cs
@@ -45,4 +45,11 @@ public record EmailContext
 #else
     public bool IsHtml { get; init; } = true;
 #endif
+
+    /// <summary>
+    /// Optional list of attachments to include with the email.
+    /// Each entry may carry its content as a byte array (<see cref="EmailAttachmentContext.Content"/>)
+    /// or reference a file on disk via <see cref="EmailAttachmentContext.FilePath"/>.
+    /// </summary>
+    public IEnumerable<EmailAttachmentContext> Attachments { get; set; } = [];
 }
\ No newline at end of file
diff --git a/src/infrastructure/DigitalData.MessagingService.Infrastructure/Services/LimilabsEmailService.cs b/src/infrastructure/DigitalData.MessagingService.Infrastructure/Services/LimilabsEmailService.cs
index 17e1afb..7616fbc 100644
--- a/src/infrastructure/DigitalData.MessagingService.Infrastructure/Services/LimilabsEmailService.cs
+++ b/src/infrastructure/DigitalData.MessagingService.Infrastructure/Services/LimilabsEmailService.cs
@@ -46,6 +46,8 @@ public class LimilabsEmailService(
             else
                 builder.Text = context.Body;
 
+            AddAttachments(builder, context.Attachments);
+
             var mail = builder.Create();
 
             result = await smtp.SendMessageAsync(mail, cancellationToken);
@@ -108,4 +110,33 @@ public class LimilabsEmailService(
 
         return message.ToString();
     }
+
+    private static void AddAttachments(MailBuilder builder, IEnumerable<EmailAttachmentContext> attachments)
+    {
+        foreach (var attachment in attachments)
+        {
+            if (attachment.IsInline)
+            {
+                var visual = builder.AddVisual(attachment.Content);
+                visual.FileName = attachment.FileName;
+                visual.ContentId = string.IsNullOrWhiteSpace(attachment.ContentId)
+                    ? attachment.FileName
+                    : attachment.ContentId;
+
+                if (!string.IsNullOrWhiteSpace(attachment.ContentType))
+                    visual.ContentType = ContentType.Parse(attachment.ContentType);
+            }
+            else
+            {
+                var part = builder.AddAttachment(attachment.Content);
+                part.FileName = attachment.FileName;
+
+                if (!string.IsNullOrWhiteSpace(attachment.ContentType))
+                    part.ContentType = ContentType.Parse(attachment.ContentType);
+
+                if (!string.IsNullOrWhiteSpace(attachment.ContentId))
+                    part.ContentId = attachment.ContentId;
+            }
+        }
+    }
 }
\ No newline at end of file