Index: branches/5.3.x/core/admin_templates/forms/form_edit_emails.tpl
===================================================================
diff -u -N -r15677 -r15690
--- branches/5.3.x/core/admin_templates/forms/form_edit_emails.tpl	(.../form_edit_emails.tpl)	(revision 15677)
+++ branches/5.3.x/core/admin_templates/forms/form_edit_emails.tpl	(.../form_edit_emails.tpl)	(revision 15690)
@@ -64,7 +64,7 @@
 			<inp2:m_RenderElement name="inp_edit_box" prefix="form" field="ReplyFromName" title="la_fld_ReplyFromName"/>
 			<inp2:m_RenderElement name="inp_edit_box" prefix="form" field="ReplyCc" title="la_fld_ReplyCc"/>
 			<inp2:m_RenderElement name="inp_edit_box" prefix="form" field="ReplyBcc" title="la_fld_ReplyBcc"/>
-			<inp2:m_RenderElement name="inp_edit_textarea" prefix="form" field="ReplyMessageSignature" title="la_fld_ReplyMessageSignature" allow_html="1"/>
+			<inp2:m_RenderElement name="inp_edit_codemirror" prefix="form" field="ReplyMessageSignature" title="la_fld_ReplyMessageSignature" allow_html="1" language="text/html"/>
 
 		<inp2:m_RenderElement name="subsection" title="la_title_ReplySettings"/>
 			<inp2:m_RenderElement name="inp_edit_box" prefix="form" field="ReplyFromEmail" title="la_fld_ReplyFromEmail"/>