diff --git a/src/main/java/org/simplejavamail/outlookmessageparser/model/OutlookFileAttachment.java b/src/main/java/org/simplejavamail/outlookmessageparser/model/OutlookFileAttachment.java
index 03230eb..b0ac647 100644
--- a/src/main/java/org/simplejavamail/outlookmessageparser/model/OutlookFileAttachment.java
+++ b/src/main/java/org/simplejavamail/outlookmessageparser/model/OutlookFileAttachment.java
@@ -20,6 +20,10 @@ public class OutlookFileAttachment implements OutlookAttachment {
 	 * Mime type of the attachment
 	 */
 	private String mimeTag;
+	/**
+	 * CID of the attachment
+	 */
+	private String contentId;
 	/**
 	 * The extension of the attachment (may not be set).
 	 */
@@ -58,6 +62,9 @@ public void setProperty(final OutlookMessageProperty msgProp) {
 				case "3703":
 					setExtension((String) value);
 					break;
+				case "3712":
+					setContentId((String) value);
+					break;
 				default:
 					// property to ignore, for full list see properties-list.txt
 			}
@@ -89,6 +96,21 @@ public String toString() {
 		return (longFilename != null) ? longFilename : filename;
 	}
 
+	/**
+	 * Bean getter for {@link #contentId}.
+	 */
+	@SuppressWarnings("ElementOnlyUsedFromTestCode")
+	public String getContentId() {
+		return contentId;
+	}
+
+	/**
+	 * Bean setter for {@link #contentId}.
+	 */
+	void setContentId(final String contentId) {
+		this.contentId = contentId;
+	}
+
 	/**
 	 * Bean getter for {@link #extension}.
 	 */
diff --git a/src/main/java/org/simplejavamail/outlookmessageparser/model/OutlookMessage.java b/src/main/java/org/simplejavamail/outlookmessageparser/model/OutlookMessage.java
index 56c1ffe..b64ad6f 100644
--- a/src/main/java/org/simplejavamail/outlookmessageparser/model/OutlookMessage.java
+++ b/src/main/java/org/simplejavamail/outlookmessageparser/model/OutlookMessage.java
@@ -313,8 +313,10 @@ public Map<String, OutlookFileAttachment> fetchCIDMap() {
 			for (final OutlookAttachment attachment : getOutlookAttachments()) {
 				if (attachment instanceof OutlookFileAttachment) {
 					final OutlookFileAttachment fileAttachment = (OutlookFileAttachment) attachment;
-					if (!tryAddCid(cidMap, html, fileAttachment, fileAttachment.getFilename())) {
-						tryAddCid(cidMap, html, fileAttachment, fileAttachment.getLongFilename());
+					if (!tryAddCid(cidMap, html, fileAttachment, fileAttachment.getContentId())) {
+						if (!tryAddCid(cidMap, html, fileAttachment, fileAttachment.getFilename())) {
+							tryAddCid(cidMap, html, fileAttachment, fileAttachment.getLongFilename());
+						}
 					}
 				}
 			}