diff --git a/mailnews/base/prefs/resources/content/SmtpServerEdit.xul b/mailnews/base/prefs/resources/content/SmtpServerEdit.xul
index 1b3e80b90a5..a84357bdfc9 100644
--- a/mailnews/base/prefs/resources/content/SmtpServerEdit.xul
+++ b/mailnews/base/prefs/resources/content/SmtpServerEdit.xul
@@ -40,7 +40,7 @@
 
 <script type="application/x-javascript" src="SmtpServerEdit.js"/>
 <keyset id="dialogKeys"/>
-<hbox id="smtpServerEditor"/>
+<vbox id="smtpServerEditor"/>
 <separator/>
 <hbox id="okCancelButtonsRight"/>