On Tue, Feb 18, 2014 at 02:38:10AM -0600, Greg wrote:
> Any way to delay a response from exim?
>
> Example: when it replies to a user or helo, delay it 2 seconds.
Unconditionally, or only when the sending system has a poor or
unknown reputation? Such delays should only be applied at the
connect banner and perhaps EHLO response to systems that have not
sent you any email in some time, and only if you use them to detect
early-talkers for dynamic temporarily black-lists.
Introducing artificial delays into deliveries from legitimate
sending systems causes congestion (increased latency drives up
concurrency) on both the sending and receiving system with no
benefit to either.
Sometimes well-meaning anti-spam measures do as much harm to the
email eco-system as the spammers, please do not introduce indiscriminate
delays into email delivery.
--
Viktor.
