On 13/10/10 12:16, Daniel Pittman wrote:
Some providers, typically big ones (*cough* Telstra, Optus) tend to play
poorly with greylisting: they have a separate pool of senders if the first
attempt is not accepted, and can delay up to 24 hours before sending.[1]
Some greylisting tools have a set of exceptions for dealing with this, others
don't. The later ... hurt more. :)
Daniel
Footnotes:
[1] Well, could, when last I managed a system with greylisting, about nine
months ago.
There are DNSwhitelists for providers out there, I don't have links handy.
Gmail is also a bit of a bad one for the retry going through a different
server.
Every one of their retries can come from different servers which can
play havoc without a whitelist.
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