diff --git a/MailTrackingFilter/sections/specific.txt b/MailTrackingFilter/sections/specific.txt
index 6fb66084e8c..fc605751b4b 100644
--- a/MailTrackingFilter/sections/specific.txt
+++ b/MailTrackingFilter/sections/specific.txt
@@ -268,7 +268,10 @@ e.mail.cnn.com$image
 ! esputnik.com
 esputnik.com$image
 ! Adobe Campaign
+postoffice.adobe.com/po-server/link/open$image
+postoffice.adobe.com%2Fpo-server%2Flink%2Fopen$image
 apo-prod.adobe.io/po-server/link/open$image
+apo-prod.adobe.io%2Fpo-server%2Flink%2Fopen$image
 sbs-mkt-stage1-res.adobe-campaign.com$image
 ! demdex.net
 demdex.net/event?d_src=$image