Is there something like denyhosts for sasl dictionary attacks?

[vendor at billoblog.com]

Is there something like denyhosts for sasl attacks?  I'm getting tired
of stuff like this:


Jan 31 04:52:38 hope saslauthd[1333]: do_auth         : auth failure:
[user=abby] [service=smtp] [realm=billoblog.com] [mech=pam] [reason=PAM
auth error]
Jan 31 04:57:35 hope saslauthd[1335]: do_auth         : auth failure:
[user=abby] [service=smtp] [realm=billoblog.com] [mech=pam] [reason=PAM
auth error]
Jan 31 05:22:05 hope saslauthd[1334]: do_auth         : auth failure:
[user=abby] [service=smtp] [realm=billoblog.com] [mech=pam] [reason=PAM
auth error]
Jan 31 06:40:05 hope saslauthd[1337]: do_auth         : auth failure:
[user=info] [service=smtp] [realm=billoblog.com] [mech=pam] [reason=PAM
auth error]
Jan 31 06:40:07 hope saslauthd[1336]: do_auth         : auth failure:
[user=info] [service=smtp] [realm=billoblog.com] [mech=pam] [reason=PAM
auth error]
Jan 31 06:40:09 hope saslauthd[1333]: do_auth         : auth failure:
[user=info] [service=smtp] [realm=billoblog.com] [mech=pam] [reason=PAM
auth error]
  etc.