[minor] select the Inbox in readonly false mode while pulling emails (#3412)

frappe/email/receive.py

@@ -174,7 +174,9 @@ class EmailServer:
 			email_list = []
 			self.check_imap_uidvalidity()
 
-			self.imap.select("Inbox", readonly=True)
+			readonly = False if self.settings.email_sync_rule == "UNSEEN" else True
+
+			self.imap.select("Inbox", readonly=readonly)
 			response, message = self.imap.uid('search', None, self.settings.email_sync_rule)
 			if message[0]:
 				email_list =  message[0].split()
@@ -261,14 +263,16 @@ class EmailServer:
 				if not cint(self.settings.use_imap):
 					self.pop.dele(msg_num)
 				else:
-					# mark as seen
-					self.imap.uid('STORE', message_meta, '+FLAGS', '(\\SEEN)')
+					# mark as seen if email sync rule is UNSEEN (syncing only unseen mails)
+					if self.settings.email_sync_rule == "UNSEEN":
+						self.imap.uid('STORE', message_meta, '+FLAGS', '(\\SEEN)')
 		else:
 			if not cint(self.settings.use_imap):
 				self.pop.dele(msg_num)
 			else:
-				# mark as seen
-				self.imap.uid('STORE', message_meta, '+FLAGS', '(\\SEEN)')
+				# mark as seen if email sync rule is UNSEEN (syncing only unseen mails)
+				if self.settings.email_sync_rule == "UNSEEN":
+					self.imap.uid('STORE', message_meta, '+FLAGS', '(\\SEEN)')
 
 	def get_email_seen_status(self, uid, flag_string):
 		""" parse the email FLAGS response """