diff --git a/2/SRI/notes/postfix.txt b/2/SRI/notes/postfix.txt
new file mode 100644
index 0000000..0d14143
--- /dev/null
+++ b/2/SRI/notes/postfix.txt
@@ -0,0 +1,12 @@
+apt install postfix
+postconf -e 'home_mailbox=Maildir/'
+postconf -e 'virtual_alias_maps=hash:/etc/postfix/virtual'
+
+# In /etc/postfix/virtual
+usuario@domin.io            usuario-real
+
+postmap /etc/postfix/virtual
+systemctl restart postfix
+echo 'export MAIL=~/Maildir' | tee -a /etc/bash.bashrc | tee -a /etc/profile.d/mail.sh
+source /etc/profile.d/mail.sh
+cat | s-nail -s 'Test' -Snorecord usuario@domin.io