I am trying to send the newsletter to the subscribers in Magento 1 but the newsletter is not sent I applied all the process for sending a newsletter but it doesn't send.
Please follow these below step:
1- Check if Magento cron is running by looking into cron_schedule table. There should be resent records for newsletter queue listed in the table and status of the module execution.
2- Run cron service manually by pointing your browser to http://your.magento.url.here/cron.php
3- Enable PHP mail log: http://php.net/manual/en/mail.configuration.php#ini.mail.log
4- Check outgoing mail queue on the server with the mailq command