diff --git a/EnvelopeGenerator.API/Controllers/EmailTemplateController.cs b/EnvelopeGenerator.API/Controllers/EmailTemplateController.cs
index 5a09af66..37d4b5ce 100644
--- a/EnvelopeGenerator.API/Controllers/EmailTemplateController.cs
+++ b/EnvelopeGenerator.API/Controllers/EmailTemplateController.cs
@@ -11,6 +11,7 @@ using EnvelopeGenerator.Application.Common.Dto;
 using DigitalData.Core.Abstraction.Application.Repository;
 using EnvelopeGenerator.Domain.Entities;
 using Microsoft.EntityFrameworkCore;
+using EnvelopeGenerator.Domain.Constants;
 
 namespace EnvelopeGenerator.API.Controllers;
 
@@ -18,32 +19,18 @@ namespace EnvelopeGenerator.API.Controllers;
 /// Controller for managing temp templates.
 /// Steuerung zur Verwaltung von E-Mail-Vorlagen.
 /// </summary>
+/// <remarks>
+/// Initialisiert eine neue Instanz der <see cref="EmailTemplateController"/>-Klasse.
+/// </remarks>
+/// <param name="mapper">
+/// <param name="repository">
+/// Die AutoMapper-Instanz, die zum Zuordnen von Objekten verwendet wird.
+/// </param>
 [Route("api/[controller]")]
 [ApiController]
-[Authorize]
-public class EmailTemplateController : ControllerBase
+[Authorize(Policy = AuthPolicy.Sender)]
+public class EmailTemplateController(IMapper mapper, IRepository<EmailTemplate> repository, IMediator mediator) : ControllerBase
 {
-    private readonly IMapper _mapper;
-
-    private readonly IRepository<EmailTemplate> _repository;
-
-    private readonly IMediator _mediator;
-
-    /// <summary>
-    /// Initialisiert eine neue Instanz der <see cref="EmailTemplateController"/>-Klasse.
-    /// </summary>
-    /// <param name="mapper">
-    /// <param name="repository">
-    /// Die AutoMapper-Instanz, die zum Zuordnen von Objekten verwendet wird.
-    /// </param>
-    [Obsolete("Use MediatR")]
-    public EmailTemplateController(IMapper mapper, IRepository<EmailTemplate> repository, IMediator mediator)
-    {
-        _mapper = mapper;
-        _repository = repository;
-        _mediator = mediator;
-    }
-
     /// <summary>
     /// Ruft E-Mail-Vorlagen basierend auf der angegebenen Abfrage ab.
     /// Gibt alles zurück, wenn keine Id- oder Typ-Informationen eingegeben wurden.
@@ -63,12 +50,12 @@ public class EmailTemplateController : ControllerBase
     {
         if (emailTemplate is null || (emailTemplate.Id is null && emailTemplate.Type is null))
         {
-            var temps = await _repository.Query.ToListAsync();
-            return Ok(_mapper.Map<IEnumerable<EmailTemplateDto>>(temps));
+            var temps = await repository.Query.ToListAsync();
+            return Ok(mapper.Map<IEnumerable<EmailTemplateDto>>(temps));
         }
         else
         {
-            var temp = await _mediator.Send(emailTemplate);
+            var temp = await mediator.Send(emailTemplate);
             return temp is null ? NotFound() : Ok(temp);
         }
     }
@@ -99,7 +86,7 @@ public class EmailTemplateController : ControllerBase
     {
         if (update is null)
         {
-            await _mediator.Send(new ResetEmailTemplateCommand(temp));
+            await mediator.Send(new ResetEmailTemplateCommand(temp));
             return Ok();
         }
         else if (temp is null)
@@ -109,7 +96,7 @@ public class EmailTemplateController : ControllerBase
         else
         {
             update.EmailTemplateQuery = temp;
-            await _mediator.Send(update);
+            await mediator.Send(update);
             return Ok();
         }
     }