I am using Amazon SES for sending out mails with a limit of sending 14mails / second. Currently I cannot set option in AcyMailing to automatically send mail with interval less than a minute. How can I solve that?
Best solution is to create your own cron job.
You can do it through the AcyMailing configuration page (you'll see the cron URL if you own a valid AcyMailing license)
It would not help, because in program setting under automatic sending option is limited to 1min as minimum.
The minimum time interval for cron is also one minute.
In version 5 you can setup a multiple queue system: https://www.acyba.com/acymailing/293-multiple-queue-system.html
That would solve your problem. This has not been added to version 6 yet. So you have three options: Revert back to version 5 , wait for Acyba to add this to version 6, or increase your send limits at Amazon.