Newsletters Sending Really Slowly. Taking a few days.
Hello, our newsletters are taking days to send. Some are likely not even sending at all. We got a response from our Hosts after complaining to them and their reply was:
"This is not the server that has been limiting this. In fact, looking at the queue, it has not gotten over ~25 email in size. If the server queued up 7000 emails and sent them slowly, that would indicate a limitation in the email server, however it appears that your Magento installation is sending them slowly to the mail server. When reviewing the mail queue, I saw some old emails that did not make it due to various errors (unable to connect to remote mail server, etc) and I have since removed them. The queue is now clean and I do not see any emails pushing through the queue."
I saw on threads that it is to do with the Cron file but I'm weary of causing further damage. Any help will be greatly appreciated. My Magento Version is 22.214.171.124