I'm looking for a good way to have people sign up for a newsletter and then send out emails in bulk. What do you use?
Aweber.com and getresponse.com are the two big names for managing autoresponders/newsletters. They're both really good, can't go wrong with either.
phpList (as mentioned above) is great - we use it for a mailinglist with >7,000 members its automated for signups/unsubscribes, you can throttle how many emails are sent out in a certain amount of time, it can carry on where it left off if the mailout times out (a problem we had with similar scripts).. and its free
phpList is very good if you're semi-technical and can handle the setup and config. The real limiting factor with a self-hosted solution like phpList is the limits your host puts on emails per hour. I was a bit surprised to find out how strict most hosts are in putting hard limits on outbound email traffic.
I just use my own system built into my script You can see it here http://www.freestuffdirect.com Hope that helps Scotto!