diff --git a/Email/Email.csproj b/Email/Email.csproj
index 70e9a68..d223fd9 100644
--- a/Email/Email.csproj
+++ b/Email/Email.csproj
@@ -6,7 +6,7 @@
     </PropertyGroup>
     <PropertyGroup>
         <Version>0.1.0</Version>
-        <TargetFramework>netstandard2.1</TargetFramework>
+        <TargetFrameworks>netstandard2.0; netstandard2.1</TargetFrameworks>
         <LangVersion>8.0</LangVersion>
         <Nullable>enable</Nullable>
         <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
diff --git a/Email/MimeKit/PickupDirectoryMimeEmailSender.cs b/Email/MimeKit/PickupDirectoryMimeEmailSender.cs
index c09a38e..10725ac 100644
--- a/Email/MimeKit/PickupDirectoryMimeEmailSender.cs
+++ b/Email/MimeKit/PickupDirectoryMimeEmailSender.cs
@@ -31,7 +31,11 @@ public PickupDirectoryMimeEmailSender(
         public async Task SendMail(MimeMessage message)
         {
             EnsurePickupDirectoryExists();
+            #if NETSTANDARD2_1
             await using var stream = OpenPickupFile(message);
+            #else
+            using var stream = OpenPickupFile(message);
+            #endif
             await message.WriteToAsync(stream);
         }