Re: qmail remote delivery logic

[Stefan Paletta]

Sam wrote/schrieb/scribsit:
> different domains will result in only 5,000 DNS queries.  Meanwhile, each
> instance of qmail-remote should diligently issue a DNS query - for a 
> grand sum of 10,000 queries overall.

When we're talking about lists of that size, you will for sure have
the resources to handle 5000, 10000 or 100000 DNS queries compared to
the resources you need for actually sending the messages.

My experiences show, that for lists of up to 10000 recipients, qmail
will already have finished lots of deliveries when the first lookups
on bad/unreachable addresses get a timeout. With serialized lookups
everything will just sit idle for ages.

I all boils down, as you said in another mail, to that qmail
opimizes for delivery time and optimizes bandwidth usage at the upper
end.

Stefan