Question : Best way to send bulk email without getting blacklisted or flagged as spam?

We're a church and we have about 3,000 attenders that have signed up to get various email newsletters and announcements.  We have about 25 different lists.  We end up sending out about 30,000 emails a month.

I am trying to find the best way to send out mass emails to these various lists without being stopped by the limitations of our host provider, the spam flagging of various products, or being blacklisted.  We don't have a lot of budget for this but want to be progressive in following CANSPAM directives.  Every email marketing provider (such as verticalresponse.com or constantcontact.com) is too expensive for us.  I've looked into AuthSMTP and they seem like they may be our best option.  

Suggestions?

Answer : Best way to send bulk email without getting blacklisted or flagged as spam?

I worked for an ISP at one point and we had customers inthe same boat. The best thing that we offered to the customer was for them to call in and we'd add them to a safe list persay for large mailings. So you could talk with your provider and see if they could remove that limitation for you. Most of the ISP, big and small, have that capability.