[ietf-dkim] Are lookalike domains like parent domains?

[Arvel Hathcock]

> Which would add a network session for every inbound email, whether  
> that email was sent by an ADSP user or not. Increasing the latency of  
> inbound mail processing is a significant cost.

It's true that the cost is non-zero and that unneeded lookups should be 
avoided however I'm wondering whether people understand the stupid 
number of queries already being done FOR EACH MESSAGE that comes in. 
It's ridiculous.  My last count was around a dozen in MDaemon (if you 
turn on all the bells and whistles).  Less than half of which are 
standardized but ALL are common amongst mail servers.  My point is that 
the time to worry overly much about whether mail servers are doing too 
many queries was about 7 years ago.  It's too late now.

Arvel