ISP message limits

[lesplan]

Hi there from Victori, BC Canada

I have a question regarding ISP message limits.

We have some 3,000 educators that access our newsletter from our website. We send them an email notification when the pdf files are posted on our site.

The problem is that our Internet service provider (Shaw) limits the number of emails that can be sent each day to 1,000. (It is the same cap for business and residential accounts). Pls see:

http://www.shaw.ca/en-ca/CustomerCare/InternetSupport/Residential/Email/ServiceDetails.htm?wbc_purpose=Basic&WBCMODE=PresentationUnpublished

After this limit is reached, my email shuts down until the next day.

I'm wondering if anyone can suggest any changes to the settings, etc. to avoid this problem? My current settings are

"delivery: sending singly, group mails of 200, with a four second delay"

Thank you in advance for your time.

Eric W.