smtp-relay: Switch to Fastmail

AWS is going to begin charging extra for routable IPv4 addresses soon.
There's really no point in having a relay in the cloud anymore anyway,
since a) all outbound messages are sent via the local relay and b) no
messages are sent to anyone except me.

roles/postfix/handlers/main.yml

@@ -1,3 +1,5 @@
+- name: rehash postfix sasl passwd table
+  command: postmap /etc/postfix/sasl_passwd
 - name: restart postfix
   service:
     name=postfix
@@ -6,7 +8,5 @@
   service:
     name=postfix
     state=reloaded
-- name: rehash postfix sasl passwd table
-  command: postmap /etc/postfix/sasl_passwd
 - name: save firewalld configuration
   command: firewall-cmd --runtime-to-permanent