On 06/27/2010 09:47 PM, Tim wrote:
On Sun, 2010-06-27 at 14:08 -0400, Genes MailLists wrote:
> So if you're gonna gray list - please whitelist all the standard ISP
> outbound mx hosts ...
That's gotta be a huge list. And won't some of them be spam sources,
anyway?
Not huge at all - I'm doing this for the outbound MX's of trusted mail
senders. Google uses about 2,700 outbound .. they are all readily
available. So we're talking a few thousand hosts.
And not doing this only causes a 3 second delay anyway.
Your question if gmail official hosts sends spam - even if it does,
the greet pause is not going to help in this case anyway - because gmail
servers follow the correct smtp protocols.
Spammer machines often dont - they send out the mail and ignore all
protocols - that why greet pause is so effective.
This splat-with-no wait is classic of spammers - e.g. a pc bot - they
program them to send the header, send the body. close. This kind of bot
will not get through the greet pause delay.
gene