I changed line 1 as Jason suggested, I still get the error after about 1 minute.
I checked php.ini to ensure it is not in safe mode, also max execution time is set to 300 in php.ini
I raised a ticket with my host and the reply is as follows...
I find this really frustrating, because I can't test it except in a live environment.
Overall, even if I had 1000 emails to send, would I have to wait for the script to process 3-4 emails a second and wait 5 minutes ?
Is anyone using UE for large mailing lists ? and how are they achieving it ?