On Wed, Jun 14, 2006 at 08:48:45AM +1000, Billy Kwong wrote:
> Hi Sonia,
> 
> Notice that it's a 4xx return code, meaning its a transient error.

doesn't it mean that the slug smtp server has tried to verify
[EMAIL PROTECTED] is a valid email adderss, by making a connect to the
smtp server for snowfrog.net (dig snowfrog.net mx) and trying a vrfy
command ?

> 
> My take is that the SLUG mail servers have greylisting enabled. Any new SMTP
> sessions would be placed on hold for a specified amount of time (normally 20
> minutes?)
> 
> The whole purpose of the exercise is to slow spammers down.
> 
> Regards,
> Bill
> 
> 
> On Tue, Jun 13, 2006 at 05:09:54PM +1000, Sonia Hamilton wrote:
> > I noticed that email sent to [EMAIL PROTECTED] is slow to be received by the
> > list; looking thru my mail logs I came across this:
> > 
> > Jun 13 11:57:06 localhost postfix/smtp[14117]: 9153D2E05: host
> > rusty.slug.org.au[202.177.212.193] said: 450 <[EMAIL PROTECTED]>:
> > Sender address rejected: unverified address: Address verification in
> > progress (in reply to RCPT TO command)
> > 
> > This 'unverified address' problem - how do I resolve it? What's causing
> > it to be unverified?
> > 
> > -- 
> > Sonia Hamilton. GPG key A8B77238.
> > .
> > "Complaining that Linux doesn't work well with Windows is like ... oh,
> > say, evaluating an early automobile and complaining that there's no
> > place to hitch up a horse." (Daniel Dvorkin)
> > -- 
> > SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/
> > Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
> 
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