diff --git a/packages/backend/src/core/EmailService.ts b/packages/backend/src/core/EmailService.ts
index a176474b95..da198d0e42 100644
--- a/packages/backend/src/core/EmailService.ts
+++ b/packages/backend/src/core/EmailService.ts
@@ -312,6 +312,7 @@ export class EmailService {
 					Accept: 'application/json',
 					Authorization: truemailAuthKey,
 				},
+				isLocalAddressAllowed: true,
 			});
 
 			const json = (await res.json()) as {
diff --git a/packages/backend/src/server/web/UrlPreviewService.ts b/packages/backend/src/server/web/UrlPreviewService.ts
index 981fbb4353..47cc09b067 100644
--- a/packages/backend/src/server/web/UrlPreviewService.ts
+++ b/packages/backend/src/server/web/UrlPreviewService.ts
@@ -170,6 +170,6 @@ export class UrlPreviewService {
 			contentLengthRequired: meta.urlPreviewRequireContentLength,
 		});
 
-		return this.httpRequestService.getJson<SummalyResult>(`${proxy}?${queryStr}`);
+		return this.httpRequestService.getJson<SummalyResult>(`${proxy}?${queryStr}`, 'application/json, */*', undefined, true);
 	}
 }