Re: Conflict with challenge/response filters

On Wed, 2005-07-06 at 17:09 +0200, Hannah Schroeter wrote:
> Now, one could enforce the standards more strictly, i.e.
> accept mail to non-SRS/SES addresses only from *non*-empty envelope
> froms, and accept mail to SRS/SES addresses only from empty envelope
> senders.
Be very careful with the latter. There are some broken systems which do
SMTP sender verification callouts with non-empty MAIL FROM, and you'd be
rejecting their probes.

-- 
dwmw2