GHC Trac spam filter is rejecting new registrations

Ben Gamari ben at
Sat Oct 15 15:38:10 UTC 2016

Robert Henderson <rob at> writes:

> Hi,
> I've been trying to register a new account on GHC Trac in order to
> submit a bug report, and I'm getting the following error:
>   Submission rejected as potential spam
>   SpamBayes determined spam probability of 90.82%
Oh dear, very sorry about that. I've adjusted the spam filter
configuration; can you try again?

> Could this be a bug or issue with a recent release of the Trac software?
> I've noticed people complaining about the same problem on other websites
> that use Trac, e.g.:
It's not a bug; it's just that spammers are quite good at emulating
humans and unfortunately Trac doesn't have very strong tools for
catching them. We use a Bayesian spam classifier to catch Trac spam, but
sadly it's imperfect.

Thanks for bringing up your issue!


- Ben
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