diff --git a/auth/assets/custom-icons/_data/custom-icons.json b/auth/assets/custom-icons/_data/custom-icons.json
index 68eb164e36..f86938b97b 100644
--- a/auth/assets/custom-icons/_data/custom-icons.json
+++ b/auth/assets/custom-icons/_data/custom-icons.json
@@ -905,6 +905,13 @@
     {
       "title": "PostNL"
     },
+    {
+      "title": "Postmark",
+      "slug": "postmarkapp",
+      "altNames": [
+        "postmarkapp"
+      ]
+    },
     {
       "title": "PostScan Mail",
       "slug": "postscanmail",
diff --git a/auth/assets/custom-icons/icons/postmarkapp.svg b/auth/assets/custom-icons/icons/postmarkapp.svg
new file mode 100644
index 0000000000..7d4f2e7b6b
--- /dev/null
+++ b/auth/assets/custom-icons/icons/postmarkapp.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="64" height="64"><defs><path id="A" d="M128 117v6a5 5 0 0 0-5 5h-6a5 5 0 1 0-10 0h-6a5 5 0 1 0-10 0h-6a5 5 0 1 0-10 0h-6a5 5 0 1 0-10 0h-6a5 5 0 1 0-10 0h-6a5 5 0 1 0-10 0h-6a5 5 0 1 0-10 0H5a5 5 0 0 0-5-5v-6a5 5 0 1 0 0-10v-6a5 5 0 0 0 0-10v-6a5 5 0 0 0 0-10v-6a5 5 0 0 0 0-10v-6a5 5 0 0 0 0-10v-6a5 5 0 0 0 0-10v-6a5 5 0 0 0 0-10V5a5 5 0 0 0 5-5h6a5 5 0 0 0 10 0h6a5 5 0 0 0 10 0h6a5 5 0 0 0 10 0h6a5 5 0 0 0 10 0h6a5 5 0 0 0 10 0h6a5 5 0 0 0 10 0h6a5 5 0 1 0 10 0h6a5 5 0 0 0 5 5v6a5 5 0 1 0 0 10v6a5 5 0 1 0 0 10v6a5 5 0 1 0 0 10v6a5 5 0 1 0 0 10v6a5 5 0 1 0 0 10v6a5 5 0 1 0 0 10v6a5 5 0 1 0 0 10z"/><rect id="B" width="96" height="96" x="16" y="16" rx="2"/></defs><g transform="matrix(.492308 0 0 .492308 .492308 .492308)" fill="none" fill-rule="evenodd"><use xlink:href="#A" fill="#f0f0f0"/><path d="M128.5 116.5v7h-.5a4.5 4.5 0 0 0-4.5 4.5v.5h-7v-.5a4.5 4.5 0 0 0-9 0v.5h-7v-.5a4.5 4.5 0 0 0-9 0v.5h-7v-.5a4.5 4.5 0 0 0-9 0v.5h-7v-.5a4.5 4.5 0 0 0-9 0v.5h-7v-.5a4.5 4.5 0 0 0-9 0v.5h-7v-.5a4.5 4.5 0 0 0-9 0v.5h-7v-.5a4.5 4.5 0 0 0-9 0v.5h-7v-.5a4.5 4.5 0 0 0-4.5-4.5h-.5v-7H0a4.5 4.5 0 0 0 0-9h-.5v-7H0a4.5 4.5 0 1 0 0-9h-.5v-7H0a4.5 4.5 0 1 0 0-9h-.5v-7H0a4.5 4.5 0 1 0 0-9h-.5v-7H0a4.5 4.5 0 1 0 0-9h-.5v-7H0a4.5 4.5 0 1 0 0-9h-.5v-7H0a4.5 4.5 0 1 0 0-9h-.5v-7H0A4.5 4.5 0 0 0 4.5 0v-.5h7V0a4.5 4.5 0 1 0 9 0v-.5h7V0a4.5 4.5 0 1 0 9 0v-.5h7V0a4.5 4.5 0 1 0 9 0v-.5h7V0a4.5 4.5 0 1 0 9 0v-.5h7V0a4.5 4.5 0 1 0 9 0v-.5h7V0a4.5 4.5 0 1 0 9 0v-.5h7V0a4.5 4.5 0 0 0 9 0v-.5h7V0a4.5 4.5 0 0 0 4.5 4.5h.5v7h-.5a4.5 4.5 0 0 0 0 9h.5v7h-.5a4.5 4.5 0 0 0 0 9h.5v7h-.5a4.5 4.5 0 0 0 0 9h.5v7h-.5a4.5 4.5 0 0 0 0 9h.5v7h-.5a4.5 4.5 0 0 0 0 9h.5v7h-.5a4.5 4.5 0 0 0 0 9h.5v7h-.5a4.5 4.5 0 0 0 0 9z" stroke="#ccc"/><path d="M127.5 117.478a5.5 5.5 0 0 1 0-10.956v-5.044a5.5 5.5 0 0 1 0-10.956v-5.044a5.5 5.5 0 0 1 0-10.956v-5.044a5.5 5.5 0 0 1 0-10.956v-5.044a5.5 5.5 0 0 1 0-10.956v-5.044a5.5 5.5 0 0 1 0-10.956v-5.044a5.5 5.5 0 0 1 0-10.956V5.478A5.502 5.502 0 0 1 122.522.5h-5.044a5.5 5.5 0 0 1-10.956 0h-5.044a5.5 5.5 0 0 1-10.956 0h-5.044a5.5 5.5 0 0 1-10.956 0h-5.044a5.5 5.5 0 0 1-10.956 0h-5.044a5.5 5.5 0 0 1-10.956 0h-5.044a5.5 5.5 0 0 1-10.956 0h-5.044a5.5 5.5 0 0 1-10.956 0H5.478A5.502 5.502 0 0 1 .5 5.478v5.044a5.5 5.5 0 0 1 0 10.956v5.044a5.5 5.5 0 0 1 0 10.956v5.044a5.5 5.5 0 0 1 0 10.956v5.044a5.5 5.5 0 0 1 0 10.956v5.044a5.5 5.5 0 0 1 0 10.956v5.044a5.5 5.5 0 0 1 0 10.956v5.044a5.5 5.5 0 0 1 0 10.956v5.044a5.502 5.502 0 0 1 4.978 4.978h5.044a5.5 5.5 0 0 1 10.956 0h5.044a5.5 5.5 0 0 1 10.956 0h5.044a5.5 5.5 0 0 1 10.956 0h5.044a5.5 5.5 0 0 1 10.956 0h5.044a5.5 5.5 0 0 1 10.956 0h5.044a5.5 5.5 0 0 1 10.956 0h5.044a5.5 5.5 0 0 1 10.956 0h5.044a5.502 5.502 0 0 1 4.978-4.978z" stroke="#fff"/><use xlink:href="#B" fill="#fedd00"/><rect width="95" height="95" x="16.5" y="16.5" rx="2" stroke="#d9b500"/><rect width="97" height="97" x="15.5" y="15.5" rx="2" stroke="#fff"/><path d="M50.3 86.084V42.3H43V35h25.886c16.168 0 19.522 10.664 19.522 18.06 0 5.934-2.408 10.492-4.902 12.986-4.042 4.042-9.546 4.988-17.888 4.988h-6.536v15.05h7.654v7.3H43v-7.3zm8.772-22.102h7.3c10.75 0 13.072-4.988 13.072-11.008 0-6.88-3.87-10.664-10.32-10.664H59.082z" fill="#000"/></g></svg>
\ No newline at end of file