Terrible False Positive Rate – How to Fix

We launched a redesigned website last month and out of 65 total API calls so far, there have been 28 false positives. Spam is always correctly marked, but so are tons of totally legit looking submissions. Even submissions I make go to spam.

I keep marking all the false positives as not spam, but it’s not getting much better. Even repeat submissions with most of the same info get marked as spam after previously being marked as not spam. Are there are other ways to train or force Akismet to lower its spam threshold?