Thanks Anna for your responding. I have created it by click on the menu subscribers -> Subscriber lists -> Add a list -> put name -> choose category -> Save. but when I browsed to that category it didn’t show a list name which I created it just increase amount of list.
Yes, maybe batch processing because I have added email address to a list around 560 emails but I can’t send them at the same time 560. I want to send them 20 emails in 30 minutes.
Okay, you want to send 20 emails in a 30 minute period.
Amend your config.php file as follows. (if it doesn’t already include this code*, copy/paste the code below)
# define the amount of emails you want to send per period. If 0, batch processing
# is disabled and messages are sent out as fast as possible
define the length of one batch processing period, in seconds (3600 is an hour)
to avoid overloading the server that sends your email, you can add a little delay
between messages that will spread the load of sending
you will need to find a good value for your own server
value is in seconds, and you can use fractions, eg “0.5” is half a second
(or you can play with the autothrottle below)
*It’s actually stored in config-extended.php but for it to work code needs to be in config/config.php file.