Hi,
I see your point on one domain, but the problem is that also all other
served domains suffer from the one that is ddos:ed. At least added delay ..
Why do people think that email is a real-time service, it was never
designed for that.
BR,
Mika
On 02/20/2017 09:37 PM, Wietse Venema wrote:
Mika Ilmaranta:
Hi,
Last week one of our clients got DDoS:ed very badly and I noticed that
"Too many address verification requests" get cached in the verify.db as
negative hits. I really think that is wrong. Only negative hits that
come from the next hop should be cached.
It's working as intended. If the client did not cache the result,
it would keep hammering the server. Keep in mind that this is a 4XX
SMTP reply code, not a hard reject, and that negative results are
cached with a shorter TTL.
Wietse
