diff --git a/mailserver.md b/mailserver.md
index 0e5e0b5..89b03fc 100644
--- a/mailserver.md
+++ b/mailserver.md
@@ -1,3 +1,35 @@
+# Upgrading Postfix & Dovecot
+
+First lock the ports so they don't get upgraded by pkg
+```
+sudo pkg lock postfix dovecot dovecot-pigeonhole
+```
+Upgrade all other packages through pkg
+```
+sudo pkg upgrade
+```
+Unlock postfix, dovecot and dovecot-pigeonhole
+```
+sudo pkg unlock postfix dovecot dovecot-pigeonhole
+```
+Upgrade postfix, dovecot and dovecot-pigeonhole via ports
+```
+cd /usr/ports/mail/postfix
+sudo make deinstall clean reinstall
+
+cd /usr/ports/mail/dovecot
+sudo make deinstall clean reinstall
+
+cd /usr/ports/mail/dovecot-pigeonhole
+sudo make deinstall clean reinstall
+```
+After that, lock ports again to prevent accidental binary upgrades
+```
+sudo pkg lock postfix dovecot dovecot-pigeonhole
+```
+
+
+
 # Dovecot
 
 ### Create Password