fix check_email_thread to do proper threading, take delay as arg

aprsd/main.py

@@ -232,13 +232,12 @@ def resend_email(count, fromcall):
     # end resend_email()
 
 
-def check_email_thread():
-    #  print "Email thread disabled."
-    #  return
+def check_email_thread(check_email_delay):
 
-    LOG.debug("Starting Email thread")
-    # how do we skip first run?
-    threading.Timer(55, check_email_thread).start()
+    while True:
+        # threading.Timer(55, check_email_thread).start()
+        
+        time.sleep(check_email_delay)
     
         shortcuts = CONFIG['shortcuts']
         # swap key/value
@@ -259,10 +258,9 @@ def check_email_thread():
             server.login(CONFIG['imap']['login'], CONFIG['imap']['password'])
         except Exception:
             LOG.exception("Failed to login with IMAP server")
-        return
+            #return
+            continue
 
-#    if 'gmail' in CONFIG['imap']['host'].lower():
-#        server.select_folder('INBOX')
         server.select_folder('INBOX')
 
         messages = server.search(['SINCE', today])
@@ -300,6 +298,7 @@ def check_email_thread():
                 server.remove_flags(msgid, [SEEN])
 
         server.logout()
+
 # end check_email()
 
 
@@ -498,7 +497,9 @@ def main(args=args):
 
     time.sleep(2)
 
-    check_email_thread()  # start email reader thread
+    check_email_delay = 60  # initial email check interval 
+    checkemailthread = threading.Thread(target=check_email_thread, args=(check_email_delay, ))  # args must be tuple
+    checkemailthread.start()
 
     LOG.info("Start main loop")
     while True: