@Sam,

Unfortunately your domain mail records may have been blacklisted for spam activity. You need to check this first and get it whitelisted. The simplest way out is to code in a counter/timer function so that the emails go at a pre-determined rate but not in a continuos pattern, or find bulk emailing provider. 

HTHs.


On Tue, Dec 13, 2011 at 11:38 AM, Samuel Waithaka <samwaithaka@gmail.com> wrote:
I'm sending mails by looping a csv file in Joomla. The first batch of about 120 emails were sent without a problem. The next batch of about 130 emails however  didn't go anywhere. Seems the mails must have been blocked somewhere.

How can I find out exactly where and how can this be prevented? Is it possible to send mails in a loop without a problem?

--
Samuel Waithaka
http://www.linkedin.com/in/waithaka
http://twitter.com/samwaithaka