I have a scheduled rule to send a HTML email, using a view to list the email addresses.
I tested this based on a couple of users ; everything worked as expected. When I increased the number of emails to around 1400, I found that half the users received the email, over and over again.
I also noticed that when I manually run cron, the page times out.
I can’t see any error messages, but these may have been cleared.
Could anyone explain why this is occurring? I’m confident that everything was working before I increased the number of users.