Preserve QOutlook inline EML attachments

src/io/outlookMail.ts

@@ -200,6 +200,7 @@ export function extractMessageBody(headers: MailHeaders, body: string): string {
 
     const bodyParts = parseMultipartBody(body, boundary)
       .filter((part) => !isAttachmentPart(part.headers))
+      .filter((part) => isMessageBodyPart(part.headers))
       .map((part) => {
         const partType = parseContentType(part.headers["content-type"]);
         return {
@@ -718,13 +719,20 @@ function unquoteHeaderValue(value: string): string {
 function isAttachmentPart(headers: MailHeaders): boolean {
   const disposition = parseContentDisposition(headers["content-disposition"]);
   const contentType = parseContentType(headers["content-type"]);
+  const dispositionValue = disposition.value.toLowerCase();
   return (
-    disposition.value.toLowerCase() === "attachment" ||
+    dispositionValue === "attachment" ||
+    (dispositionValue === "inline" && Boolean(headers["content-id"])) ||
     Boolean(decodeMimeParameter(disposition.parameters, "filename")) ||
     Boolean(decodeMimeParameter(contentType.parameters, "name"))
   );
 }
 
+function isMessageBodyPart(headers: MailHeaders): boolean {
+  const contentType = parseContentType(headers["content-type"]);
+  return contentType.mediaType.startsWith("multipart/") || contentType.mediaType === "text/plain" || contentType.mediaType === "text/html";
+}
+
 function decodeHtmlEntities(value: string): string {
   const namedEntities: Record<string, string> = {
     amp: "&",