I want to make newsletter mailing system wherein user can mail newsletter to members of the site.
There are approximately 15,00,000 members.
Currently user is using outlook which takes lots of time and is tedious for the user.
Newsletter will be in html format.
I spoke to ISP they informed 1000 emails per day is ok to send and at at a time send around 150 emails, then halt for at least 1 hour then proceed further.
Any suggestions so that news letter does not get spam and user should able to mail them faster.