diff --git a/Builder/IISMainHandler/build.txt b/Builder/IISMainHandler/build.txt
index ca6d18c..51d3b0f 100644
--- a/Builder/IISMainHandler/build.txt
+++ b/Builder/IISMainHandler/build.txt
@@ -1 +1 @@
-616
\ No newline at end of file
+617
\ No newline at end of file
diff --git a/Builder/IISUploadHandler/build.txt b/Builder/IISUploadHandler/build.txt
index 0dbf139..b2786cd 100644
--- a/Builder/IISUploadHandler/build.txt
+++ b/Builder/IISUploadHandler/build.txt
@@ -1 +1 @@
-350
\ No newline at end of file
+351
\ No newline at end of file
diff --git a/Common/dataobjects/PMMessage.cs b/Common/dataobjects/PMMessage.cs
index 5547f6f..e9fccbb 100644
--- a/Common/dataobjects/PMMessage.cs
+++ b/Common/dataobjects/PMMessage.cs
@@ -117,6 +117,11 @@ namespace FLocal.Common.dataobjects {
 				return this._incomingPMId;
 			}
 		}
+		public PMMessage incomingPM {
+			get {
+				return PMMessage.LoadById(this.incomingPMId.Value);
+			}
+		}
 
 		private bool _isRead;
 		public bool isRead {
@@ -160,6 +165,9 @@ namespace FLocal.Common.dataobjects {
 				new XElement("body", context.outputParams.preprocessBodyIntermediate(this.body)),
 				new XElement("bodyUBB", this.bodyUBB)
 			);
+			if(this.direction == ENUM_DIRECTION_OUTGOING) {
+				result.Add(new XElement("isReadByInterlocutor", this.incomingPM.isRead));
+			}
 			if(additional.Length > 0) {
 				result.Add(additional);
 			}
diff --git a/static/css/global.css b/static/css/global.css
index c9c352d..c4bf9bc 100644
--- a/static/css/global.css
+++ b/static/css/global.css
@@ -82,3 +82,6 @@ pre
 [spoiler] [opener] {
 	cursor:hand;
 }
+.warning {
+	background-color:red;
+}
\ No newline at end of file
diff --git a/templates/Full/elems/PMInfo.xslt b/templates/Full/elems/PMInfo.xslt
index 9b521cd..55c7713 100644
--- a/templates/Full/elems/PMInfo.xslt
+++ b/templates/Full/elems/PMInfo.xslt
@@ -15,6 +15,9 @@
 							<table width="100%" border="0" cellpadding="0" cellspacing="0">
 								<tr>
 									<td align="left" width="65%" valign="top">
+										<xsl:if test="isReadByInterlocutor='false'">
+											<xsl:attribute name="class">warning</xsl:attribute>
+										</xsl:if>
 										<a target="_blank" class="separate">
 											<img border="0" alt="" style="vertical-align: text-bottom">
 												<xsl:choose>