diff --git a/model/lib/email/attachment.dart b/model/lib/email/attachment.dart
index cdbafa59a..dd73c7bad 100644
--- a/model/lib/email/attachment.dart
+++ b/model/lib/email/attachment.dart
@@ -37,10 +37,6 @@ class Attachment with EquatableMixin {
 
   bool isDispositionInlined() => disposition == ContentDisposition.inline;
 
-  bool isDispositionAttachment() => disposition == ContentDisposition.attachment;
-
-  bool isDispositionAttachmentNoCID() => isDispositionAttachment() && noCid();
-
   bool isApplicationRTFInlined() => type?.mimeType == applicationRTFType && isDispositionInlined();
 
   String getDownloadUrl(String baseDownloadUrl, AccountId accountId) {
diff --git a/model/lib/extensions/attachment_extension.dart b/model/lib/extensions/attachment_extension.dart
index 7a0d06ac2..dcc25b7b4 100644
--- a/model/lib/extensions/attachment_extension.dart
+++ b/model/lib/extensions/attachment_extension.dart
@@ -29,7 +29,7 @@ extension AttachmentExtension on Attachment {
   }
 
   bool isOutsideAttachment(List<Attachment> htmlBodyAttachments) {
-    return (isDispositionAttachmentNoCID() || !isDispositionInlined()) &&
+    return (noCid() || !isDispositionInlined()) &&
       !isApplicationRTFInlined() &&
       !htmlBodyAttachments.include(this);
   }