diff --git a/roles/postfix/vars/main.yml b/roles/postfix/vars/main.yml
index 1819dbfa5d..a9dfc1daf2 100644
--- a/roles/postfix/vars/main.yml
+++ b/roles/postfix/vars/main.yml
@@ -3,4 +3,51 @@
 postfix_main_cf: "/etc/postfix/main.cf"
 postfix_allowed_relay_hosts: "/etc/postfix/mynetworks"
 postfix_relay_hosts_addresses:
-  - 172.20.80.12
+  - abid-prod1.princeton.edu
+  - abid-prod2.princeton.edu
+  - bibdata-prod1.princeton.edu
+  - bibdata-prod2.princeton.edu
+  - bibdata-worker-prod1.princeton.edu
+  - bibdata-worker-prod2.princeton.edu
+  - byzantine-tsp-prod1.princeton.edu
+  - byzantine-tsp-prod2.princeton.edu
+  - catalog1.princeton.edu
+  - catalog2.princeton.edu
+  - catalog3.princeton.edu
+  - dpul-prod1.princeton.edu
+  - dpul-prod2.princeton.edu
+  - dss-prod1.princeton.edu
+  - dss-prod2.princeton.edu
+  - figgy-web-prod1.princeton.edu
+  - figgy-web-prod2.princeton.edu
+  - figgy-web-prod3.princeton.edu
+  - figgy-web-prod4.princeton.edu
+  - fpul-prod1.princeton.edu
+  - lae-prod1.princeton.edu
+  - lae-prod2.princeton.edu
+  - lib-jobs-prod1.princeton.edu
+  - lib-jobs-prod2.princeton.edu
+  - lib-mudd-prod2.princeton.edu
+  - lib-sc-prod1.princeton.edu
+  - lib-vr-prod1.princeton.edu
+  - library-prod1.princeton.edu
+  - library-prod3.princeton.edu
+  - library-prod4.princeton.edu
+  - lockers-and-study-spaces-prod2.princeton.edu
+  - maps-prod1.princeton.edu
+  - maps-prod2.princeton.edu
+  - oawaiver-prod1.princeton.edu
+  - oawaiver-prod2.princeton.edu
+  - orcid-prod1.princeton.edu
+  - orcid-prod2.princeton.edu
+  - pdc-describe-prod1.princeton.edu
+  - pdc-describe-prod2.princeton.edu
+  - pdc-discovery-prod1.princeton.edu
+  - pdc-discovery-prod2.princeton.edu
+  - prds-prod2.princeton.edu
+  - pulfalight-jammy-prod1.princeton.edu
+  - pulfalight-jammy-prod2.princeton.edu
+  - recap-www-prod1.princeton.edu
+  - slavery-prod1.princeton.edu
+  - tigerdata-prod1.princeton.edu
+  - tigerdata-prod2.princeton.edu