diff --git a/mail_to/static/src/css/mail_to.css b/mail_to/static/src/css/mail_to.css
index 3ab97a7..2944174 100644
--- a/mail_to/static/src/css/mail_to.css
+++ b/mail_to/static/src/css/mail_to.css
@@ -6,17 +6,11 @@
 }
 
 .o_mail_thread .o_thread_message span.recipients_info,
-.o_mail_thread .o_thread_message i.o_thread_message_star,
-.o_mail_thread .o_thread_message i.o_thread_message_reply,
-.o_mail_thread .o_thread_message i.oe_move,
-.o_mail_thread .o_thread_message i.o_thread_message_needaction {
+.o_mail_thread .o_thread_message i.fa {
     opacity: 0.4;
 }
 
-.o_mail_thread .o_thread_message:hover i.o_thread_message_star,
-.o_mail_thread .o_thread_message:hover i.o_thread_message_reply,
-.o_mail_thread .o_thread_message:hover i.oe_move,
-.o_mail_thread .o_thread_message:hover i.o_thread_message_needaction {
+.o_mail_thread .o_thread_message:hover i.fa {
     opacity: 0.7;
 }