Re: Yahoo sent 5.5x as much spam as any other legit provider in April

[Giles Coochey]

On Thu, May 12, 2011 18:06, Ted Mittelstaedt wrote:
> On 5/12/2011 4:49 AM, Niamh Holding wrote:
>>
>> Hello Matus,
>>
>> Thursday, May 12, 2011, 12:11:10 PM, you wrote:
>>
>> MUf>  Actyally, Michael Scheidell reported that yahoo miebehaves when
>> receiving
>> MUf>  4xx response after RCPT TO:
>>
>> Very different from the original blanket claim that "Yahoo's SMTP
>> mailers are
>> unable to handle a standard SMTP error 4xx, if they get one they abort
>> the transmission and return the message to the sender"
>>
>
> And yet Googles server farm has no problem with greylist-milter.
>
Not quite - Google's retry may come from another server in a different
range... and because the ranges can change (over time) I tend to stay away
from Greylisting, despite its effectiveness I am paranoid about false
positives.