add missing config example

Author: a1012112796

custom/conf/app.example.ini

@@ -1102,6 +1102,14 @@ RUN_AT_START = false
 NO_SUCCESS_NOTICE = false
 SCHEDULE = @every 72h
 
+; fetch unread mails
+[cron.imap_fetch_mails]
+; when [mail_recive] is enable, this will auto enable also
+ENABLED = false
+RUN_AT_START = false
+NO_SUCCESS_NOTICE = false
+SCHEDULE = @every 5m
+
 [git]
 ; The path of git executable. If empty, Gitea searches through the PATH environment.
 PATH =

modules/cron/tasks_extended.go

@@ -121,7 +121,7 @@ func registerRemoveRandomAvatars() {
 func registerImapFetchUnReadMails() {
 	RegisterTaskFatal("imap_fetch_mails", &BaseConfig{
 		Enabled:    setting.MailReciveService != nil,
-		RunAtStart: true,
+		RunAtStart: false,
 		Schedule:   "@every 5m",
 	}, func(ctx context.Context, _ *models.User, _ Config) error {
 		return imap.FetchAllUnReadMails()