Use `NullEmailSender` in module template project.

templates/module/aspnet-core/host/MyCompanyName.MyProjectName.Blazor.Server.Host/MyProjectNameBlazorHostModule.cs

@@ -5,6 +5,7 @@ using Blazorise.Bootstrap5;
 using Blazorise.Icons.FontAwesome;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Hosting;
 using Microsoft.OpenApi.Models;
 using MyCompanyName.MyProjectName.Blazor.Server.Host.Menus;
@@ -26,6 +27,7 @@ using Volo.Abp.AspNetCore.Serilog;
 using Volo.Abp.AuditLogging.EntityFrameworkCore;
 using Volo.Abp.Autofac;
 using Volo.Abp.Data;
+using Volo.Abp.Emailing;
 using Volo.Abp.EntityFrameworkCore;
 using Volo.Abp.FeatureManagement;
 using Volo.Abp.FeatureManagement.EntityFrameworkCore;
@@ -196,6 +198,10 @@ namespace MyCompanyName.MyProjectName.Blazor.Server.Host
             {
                 options.AppAssembly = typeof(MyProjectNameBlazorHostModule).Assembly;
             });
+
+#if DEBUG
+            context.Services.Replace(ServiceDescriptor.Singleton<IEmailSender, NullEmailSender>());
+#endif
         }
 
         public override void OnApplicationInitialization(ApplicationInitializationContext context)

templates/module/aspnet-core/host/MyCompanyName.MyProjectName.IdentityServer/MyProjectNameIdentityServerModule.cs

@@ -5,6 +5,7 @@ using Microsoft.AspNetCore.Cors;
 using Microsoft.AspNetCore.DataProtection;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Hosting;
 using MyCompanyName.MyProjectName.MultiTenancy;
 using StackExchange.Redis;
@@ -25,6 +26,7 @@ using Volo.Abp.Autofac;
 using Volo.Abp.Caching;
 using Volo.Abp.Caching.StackExchangeRedis;
 using Volo.Abp.Data;
+using Volo.Abp.Emailing;
 using Volo.Abp.EntityFrameworkCore;
 using Volo.Abp.EntityFrameworkCore.SqlServer;
 using Volo.Abp.FeatureManagement;
@@ -179,6 +181,10 @@ namespace MyCompanyName.MyProjectName
                         .AllowCredentials();
                 });
             });
+
+#if DEBUG
+            context.Services.Replace(ServiceDescriptor.Singleton<IEmailSender, NullEmailSender>());
+#endif
         }
 
         public override void OnApplicationInitialization(ApplicationInitializationContext context)

templates/module/aspnet-core/host/MyCompanyName.MyProjectName.Web.Unified/MyProjectNameWebUnifiedModule.cs

@@ -2,6 +2,7 @@ using System.IO;
 using System.Reflection;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Hosting;
 using MyCompanyName.MyProjectName.EntityFrameworkCore;
 using MyCompanyName.MyProjectName.MultiTenancy;
@@ -17,6 +18,7 @@ using Volo.Abp.AspNetCore.Serilog;
 using Volo.Abp.AuditLogging.EntityFrameworkCore;
 using Volo.Abp.Autofac;
 using Volo.Abp.Data;
+using Volo.Abp.Emailing;
 using Volo.Abp.EntityFrameworkCore;
 using Volo.Abp.EntityFrameworkCore.SqlServer;
 using Volo.Abp.FeatureManagement;
@@ -132,6 +134,10 @@ namespace MyCompanyName.MyProjectName
             {
                 options.IsEnabled = MultiTenancyConsts.IsEnabled;
             });
+
+#if DEBUG
+            context.Services.Replace(ServiceDescriptor.Singleton<IEmailSender, NullEmailSender>());
+#endif
         }
 
         public override void OnApplicationInitialization(ApplicationInitializationContext context)