Hi there, my name is Roger Whitcomb, my website is hosted on a shared server here on Lunarpages. I've been hosted with you for over 2 years with, up until now, no problems at all.
I have a mailing list where subscribed users can be notified about my website being updated. Yesterday I sent out two lots of 195 emails with a 3 hour gap in between, the first batch at 3.30 GMT and the second batch at 18:10 GMT.
I am well aware of the 200 emails per hour limit. I have been informed by Lunarpages Support that the email account I sent these emails from has now been permanently disabled!  
I am being accused of sending out more than the 200 email per hour limit. This is simply not true.
I have a script I use that enables me to send out emails a few at a time. I sent the first 180 out in lots of 20 and the last lot was 15 making a total of 195.
I did the same when sending out the second batch making a total of 390. I've even double checked to make sure this is the case.
Lunarpages support are still saying I've exceeded their limits and will not listen to reason.
Is there any one else I can speak to about this? The support telephone has a fault and I can't get through on this number.
I think Lunarpages need to make people aware that the limit is not 200 but less than that. I have NOT breached the email sending limit, I can even supply a screenshot to prove it if that's required.
What should my next step be to solve this problem?  

Regards, Roger

You say that you sent out "in lots of 20". Did you sleep(60) between each lot? If not, how did you keep your rate down to a maximum of 20 per minute? That should have taken 9 or 10 minutes (for 195).

An alternative would be to send out singly, with a sleep(12) between each. That would pace you at 300 per hour, which is the maximum suggested. You should be able to do that all day, without having to break in the middle.

Another idea would be to use a mailing list program such as PHPlist to do the throttling for you. Just make sure you configure it to 20 per minute and 300 per hour maximums. Of course, you then need a way to get your address list from wherever it lives, over to PHPlist.

I agree with @Mitch that something must have gone wrong with your setup, causing you to dump more than 20 per minute (or 400 per hour, the absolute stop drop dead limit) into the system. Of course, if you mail() 20 times in one batch, you have only one recipient address per mailing, right? The 20/300 limits are for total recipient addresses, not the number of times PHP mail() (or the equivalent) is called.