diff --git a/themis/search/indexer.py b/themis/search/indexer.py
index 5c5b1ce..125659e 100644
--- a/themis/search/indexer.py
+++ b/themis/search/indexer.py
@@ -4,6 +4,10 @@ from five import grok
 import plone.dexterity.interfaces
 from Products.CMFCore.utils import getToolByName
 from ZODB.POSException import ConflictError
+from zope import component
+
+from zc.relation.interfaces import ICatalog
+from zope.app.intid.interfaces import IIntIds
 
 from themis.fields.vocabs import ContactsSource
 
@@ -351,3 +355,24 @@ def mailHandledByTxtIndexer(obj):
         return None
 
 grok.global_adapter(mailHandledByTxtIndexer, name="mailHandledByTxt")
+
+
+@indexer(plone.dexterity.interfaces.IDexterityItem)
+def mailPointingDocsTxtIndexer(obj):
+    if obj.portal_type not in ('courrier_entrant', 'courrier_sortant'):
+        return None
+    intids = component.getUtility(IIntIds)
+    catalog = component.getUtility(ICatalog)
+    values = []
+    try:
+        doc_intid = intids.getId(obj)
+    except KeyError:
+        return None
+    for relationvalue in catalog.findRelations({'to_id': doc_intid}):
+        values.append(relationvalue.from_object.Title())
+    if values:
+        return ', '.join(values)
+    else:
+        return None
+
+grok.global_adapter(mailPointingDocsTxtIndexer, name="mailPointingDocsTxt")
diff --git a/themis/search/profiles/default/catalog.xml b/themis/search/profiles/default/catalog.xml
index 6cb1b90..9d74e47 100644
--- a/themis/search/profiles/default/catalog.xml
+++ b/themis/search/profiles/default/catalog.xml
@@ -67,6 +67,7 @@
   <column value="mailContact"/>
   <column value="mailCategoryTxt"/>
   <column value="mailRelatedDocsTxt"/>
+  <column value="mailPointingDocsTxt"/>
   <column value="mailHandledByTxt"/>
   <column value="mailDate"/>
   <column value="docDate"/>