Add support for protocolLogger to MailKit PR358

https://github.com/carlin010/FluentEmail

Author: JohnCampionJr

src/Senders/FluentEmail.MailKit/FluentEmailMailKitBuilderExtensions.cs

@@ -1,5 +1,6 @@
 using FluentEmail.Core.Interfaces;
 using FluentEmail.MailKitSmtp;
+using MailKit;
 using Microsoft.Extensions.DependencyInjection.Extensions;
 
 namespace Microsoft.Extensions.DependencyInjection
@@ -11,5 +12,10 @@ public static FluentEmailServicesBuilder AddMailKitSender(this FluentEmailServic
             builder.Services.TryAdd(ServiceDescriptor.Scoped<ISender>(_ => new MailKitSender(smtpClientOptions)));
             return builder;
         }
+        public static FluentEmailServicesBuilder AddMailKitSender(this FluentEmailServicesBuilder builder, SmtpClientOptions smtpClientOptions, IProtocolLogger protocolLogger)
+        {
+            builder.Services.TryAdd(ServiceDescriptor.Scoped<ISender>(_ => new MailKitSender(smtpClientOptions, protocolLogger)));
+            return builder;
+        }
     }
 }

src/Senders/FluentEmail.MailKit/MailKitSender.cs

@@ -8,6 +8,7 @@
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
+using MailKit;
 
 namespace FluentEmail.MailKitSmtp
 {
@@ -17,6 +18,7 @@ namespace FluentEmail.MailKitSmtp
     public class MailKitSender : ISender
     {
         private readonly SmtpClientOptions _smtpClientOptions;
+        private readonly IProtocolLogger _protocolLogger;
 
         /// <summary>
         /// Creates a sender that uses the given SmtpClientOptions when sending with MailKit. Since the client is internal this will dispose of the client.
@@ -27,6 +29,12 @@ public MailKitSender(SmtpClientOptions smtpClientOptions)
             _smtpClientOptions = smtpClientOptions;
         }
 
+        public MailKitSender(SmtpClientOptions smtpClientOptions, IProtocolLogger protocolLogger)
+        {
+            _smtpClientOptions = smtpClientOptions;
+            _protocolLogger = protocolLogger;
+        }
+
         /// <summary>
         /// Send the specified email.
         /// </summary>
@@ -52,7 +60,7 @@ public SendResponse Send(IFluentEmail email, CancellationToken? token = null)
                     return response;
                 }
 
-                using (var client = new SmtpClient())
+                using (var client = _protocolLogger == null ? new SmtpClient() : new SmtpClient(_protocolLogger))
                 {
                     if (_smtpClientOptions.SocketOptions.HasValue)
                     {
@@ -115,7 +123,7 @@ public async Task<SendResponse> SendAsync(IFluentEmail email, CancellationToken?
                     return response;
                 }
 
-                using (var client = new SmtpClient())
+                using (var client = _protocolLogger == null ? new SmtpClient() : new SmtpClient(_protocolLogger))
                 {
                     if (_smtpClientOptions.SocketOptions.HasValue)
                     {