bump poll interval to 2 minutes and use IDLE - been using IDLE this whole time without realizing it

.fetchmailrc

@@ -1,12 +1,12 @@
-#set daemon 30
+set daemon 120
 set postmaster pi
 set syslog
 
 poll imap.mailfence.com with protocol IMAP service 993 ;
     username "USER" is "pi" here;
     ssl;
-#    idle;
-    folder "Inbox/Crop Swap Mail Incoming" keep fetchall;
+    idle;
+    folder "Inbox/Crop Swap Mail Incoming" fetchall;
 
 
 mda "/usr/bin/maildrop -f%F"