Blacklists are for the serious spammers.
When you say "goes to spam", it can be a function of your ISP and email program. E.g., AOL is notorious for sending valid email to spam and blocking other valid email.
I assume that you are testing email sent from your website to your visitors and are concerned that your visitors aren't getting your emails.
Always copy yourself on emails going out from your website.
Why? You can catch holes in your website when spammers use your site to send mass emails.
It may be a pain, but at least you can monitor abuse at your website.
This doesn't work if you're on a shared email IP because another website might be the culprit.
We caught a spammer right away, however, AOL still blocked our emails from the few emails that got through. If anyone blocks your email IP, it'll be AOL. They have a tool where you can send a test email from the suspected IP at
http://postmaster.info.aol.com/tools/ipverify.html.
If you don't get the reply email, then look hard at your software. After you fix it, send a message to AOL. They were helpful in unblocking our emails.