diff --git a/htdocs/langs/en_US/admin.lang b/htdocs/langs/en_US/admin.lang
index 9c9a5c136fb..a2b89101d16 100644
--- a/htdocs/langs/en_US/admin.lang
+++ b/htdocs/langs/en_US/admin.lang
@@ -1948,8 +1948,8 @@ CodeLastResult=Latest result code
 NbOfEmailsInInbox=Number of emails in source directory
 LoadThirdPartyFromName=Load third party searching on %s (load only)
 LoadThirdPartyFromNameOrCreate=Load third party searching on %s (create if not found)
-WithDolTrackingID=Dolibarr Reference found in Message ID
-WithoutDolTrackingID=Dolibarr Reference not found in Message ID
+WithDolTrackingID=Message from a conversation initiated by a first email sent from Dolibarr
+WithoutDolTrackingID=Message from a conversation initiated by a first email NOT sent from Dolibarr
 FormatZip=Zip
 MainMenuCode=Menu entry code (mainmenu)
 ECMAutoTree=Show automatic ECM tree