[Mailman-Users] Slow Performance on semi-large lists

[Dan Mick]

> On 14 Dec 2000, Neil Cooler wrote:
> > I found a little nugget of joy on the mailman FAQ about disabling
> > synchronous DNS for messages originating from localhost, but have not
> > been able to figure out how to do that in Sendmail (its not in the
> > README.sendmail).
> 
> Use a sendmail invocation with -ODeliveryMode=d or -odd on the command
> line.

The problem with this is that it appears to disable unauthorized-relay
protection, which I consider pretty important antispam tactics.