HELP! how do I send unlimited emails per day?

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The review of this web host was started by polymath on 2009-11-24 01:45:30:

Hi guys, I’m not sure whether this is the right category to place this topic, but I can’t find where email topics belong.
Here’s my problem, I have a growing number of subscriptions from our website, currently at 18k opt-in subscriptions and still growing. The webhost i have right now only allows limited number of email relays per day. Do you know how I can send my own emails without any limits? How can I do this cheaply or better still for free? I was thinking of hosting my own site for that reason, but can I send unlimited emails if I have my own hosting?
One more problem, sometimes a subscriber mistakes my email as spam even if he opted in for the subscription, then reports it to my webhost, I often get a lot of hassle with my webhosting provider this way. Any suggestions will be greatly appreciated. thanks again guys:)

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