Viktor Dukhovni:
> On Wed, Jan 08, 2014 at 09:44:15PM +0000, Aaron Bennett wrote:
>
> > Thanks, Wietse. I don't want soft_bounce=yes for everything so
> > I'll probably created a dedicated transport for that host. Does
> > that seem reasonable?
>
> You'll also have messages addressed to invalid recipients (if any)
> queued up and retried periodically rather than bounced quickly.
> There is IIRC not yet a way to soft bounce just address lookup
> errors.
Postfix already has a feature that substitutes remote SMTP server
replies (smtp_reply_filter).
Maybe it's possible to implement a similar substitution for DNS
server responses. If we want to use a regexp-based approach that
requires a conversion from DNS reply to text. The text is then
transformed by the filter, and then converted back to DNS response.
I'm not recommending we do DNS -> XML + XPATH -> DNS.
Wietse
