At 06.45 25/04/08, you wrote:

>Greylisting is not working as well as it used to... Verizon, Hotmail and
>Yahoo Mail seem to not re-send correctly when Graylisting is ON. I previously
>posted about this....

AFAIK it is only Yahoo Groups that does no resend and requires xnet 
or white list. In any event, if they do not resend on a 4xx they are 
likely to lose mails whenever the recipient is busy for whatever 
reason, besides glst, and besides breaking RFCs.

And yes, glst seems to be the ultimate solution against mail viri: I 
have hardly seen any virus hitting my server since using glst, and 
the very few come with DSNs to forged senders or from legitimate 
servers without an (updated) AV. Unfortunately glst seems to be 
ineffective against phishers: they systematically retry and bypass 
it, and need be blocked by other means.

Ciao, Francesco

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