What your describing sounds like an opt-in sort of proposition, where interested persons give you an email address to send the newsletter to. It's then up to them to make sure any spam filter they might use doesn't classify your company's newsletter as spam.
The only reason you'd need to use proxy servers to bypass spam filters would be if you're a spamming outfit, in which case, you're probably going to find precious few people willing to give you even the time of day.
Hello, I'm an Executive Assistant for a major consulting firm here in Michigan, and we are trying to send a newsletter flyer out to our clients informing them of our new business management software.
The situation is, I've purchased a number of email bulk sending machines, to send out the emails.
Now, I'm told that by using a list of proxies and a lot of proxies, I will be able to bypass some spam filter walls, also increase the sending speed, and decrease the failure rate of the emails.
I'm totally new to this type of computing experience. I'm wondering if anybody could offer some type of assistance on how to program a list of proxies in my bulk email program, to be able to send out the emails to our list of clients.