[RFCI-Discuss] postmaster policy and envelope sender rejection

[Alan Brown]

On Mon, 5 Feb 2007, Matus UHLAR - fantomas wrote:

> > Could rejecting MAIL FROM immediately, without waiting to see if the
> > recipients might be rfc2142 addresses, be reason for listing?
>
> If you reject empty envelope from, yes.

ITYM "blanket reject"

> > Reasons for rejection might be violation of SPF records, sender address
> > verification callout failure or local blacklisting of certain sender
> > addresses. The reason for rejection is explained in the 550 message.
>
> Imho this should be completely OK.

"Site-specific policy"

It's amazing how much spam still comes with a nullsender envelope.

> However you should not send mail to anyone you reject mail from...

It's a pity there aren't modules to do DNSBL lookups on outbound
connections...

AB