Thus spake Alessandro Vesely on Fri, May 14, 2004 at 01:42:12AM CDT
> Sam Varshavchik wrote:
> > [...]
> > Now, one change that can be made is to disable all filtering completely if
> > RELAYCLIENT is set. This is going to disable all content filtering for all
> > senders with relaying privileges. I'm just not sure if we want to do that.
> >
> Pardon my intrusion, but this option looks like requiring two servers:
> one to accept incoming mail from any "stupid client" and the other for
> filtering e-mail according to varying recipients' requirements.
I don't think so. A single server can handle the job, but should be able to
disable content filtering based on certain criteria. I can use embedded
maildrop to do exactly this, and no separate server is required.
The issue boils down to the fact that SMCs ('stupid mail clients') are far
more likely to need an exemption from content filtering than are remote
servers. I would guess that generally, IPs permitted to relay by the
RELAYCLIENT setting are likely to host SMCs, so an exemption based on this
setting is logical.
Connections using authenticated SMTP are also likely to be SMCs and thus
require such an exemption. I don't know if there's much server to server
use of authenticating SMTP, but what with the rise of various anti-spam
technologies such as SPF I would expect that there would be an increase in
the use of authenticated SMTP.
And Sam, please don't flame me :-) I know you don't like SPF.
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