Matt wrote: >> In xbl ? Have you tried reporting any to Spamhaus (if they really are FP's)
>
> I would guess there not really false postives its just that some
> listed email servers have a lot of legitiment email coming from them
> as well. Had someone complaining they could not get email from a
> given domain. We are a small ISP and turned out the domain was hosted
> by another local ISP. Emailed there admin to tell him one of his
> servers was listed likely due to one of the of his email clients
> having a virus. Kept checking every few days but even after several
> weeks it was not fixed/de-listed. Emailed several times too.
>
>> about it, have you tried responding with a 4xx if they are on Spamcop ? That
>> way if the listing on it expires the mail will be delivered on a retry.
>
> How do you do that?
>
defer
dnslists = bl.spamcop.net
message = listed on spamcop
