Index: src/wp-admin/css/forms.css
===================================================================
--- src/wp-admin/css/forms.css	(revision 47839)
+++ src/wp-admin/css/forms.css	(working copy) 
@@ -1448,11 +1455,6 @@
 		box-sizing: border-box;
 	}
 
-	.form-table .form-required.form-invalid td:after {
-		float: right;
-		margin: -30px 3px 0 0;
-	}
-
 	input[type="text"].small-text,
 	input[type="search"].small-text,
 	input[type="password"].small-text,
@@ -1466,6 +1468,15 @@
 		margin: 0 3px;
 	}
 
+	.form-table input[type='text']#mailserver_port.small-text {
+		margin-top: 3px;
+	}	
+
+	.form-table .form-required.form-invalid td:after {
+		float: right;
+		margin: -30px 3px 0 0;
+	}
+
 	#pass-strength-result {
 		width: 100%;
 		box-sizing: border-box;