Re: [exim] Funny and sad side of grey listing when they have…

I use the /24 subnet instead of the specific ip address that work were well

It done via mysql calls in exim.conf and work great

/Lasse

Paul wrote:
> This is not a problem with exim - but others may notice it in their
> logs, and since I did not immediately twig to the cause, I thought I'd
> post it on this list to help others...
>
> On a routine trawl through my logs, I noticed one of the sites regularly
> sent to is now greylisting - so far so good, exim doesn't care and
> beyond that it uses more of my resources for each message neither do
> I... but now for the funny bit - initially I thought the exim retry
> mechanism was broken (it isn't) because there was an (almost) instant
> retry on the temporary failed delivery... then I worked out why - take a
> look at this log below (email addresses altered to protect the guilty).
>
> 2006-01-28 19:02:06 1F2l24-0000rB-2E <= abc@???
> H=([203.12.35.101]) [203.12.35.101] P=esmtp S=829
> id=43DB325B.3050907@???
>
> Initial try fails because of grey listing
> 2006-01-28 19:02:13 1F2l24-0000rB-2E SMTP error from remote mail server
> after RCPT TO:<abc@???>: host vscan2.hotkey.net.au
> [202.138.0.45]: 450 <abc@hotke
> y.net.au>: Recipient address rejected: Policy Rejection: Hotkey
> Greylisting in progress ... Please try again after 2 minutes
>
> A subsequent try, almost immediately - this is what made me think my
> retry config was wrong
> 2006-01-28 19:02:19 1F2l24-0000rB-2E SMTP error from remote mail server
> after RCPT TO:<abc@???>: host vscan3.hotkey.net.au
> [202.138.0.46]: 450 <abc@hotke
> y.net.au>: Recipient address rejected: Policy Rejection: Hotkey
> Greylisting in progress ... Please try again after 2 minutes
>
> And another subsequent, try, again, almost immediately
> 2006-01-28 19:02:20 1F2l24-0000rB-2E == abc@??? R=dnslookup
> T=remote_smtp defer (-44): SMTP error from remote mail server after RCPT
> TO:<abc@???
> u>: host vscan1.hotkey.net.au [202.138.0.44]: 450 <abc@???>:
> Recipient address rejected: Policy Rejection: Hotkey Greylisting in
> progress ... Please try again af
> ter 2 minutes
>
> Finally it gets through...
> 2006-01-28 19:25:19 1F2l24-0000rB-2E => abc@??? R=dnslookup
> T=remote_smtp H=vscan1.hotkey.net.au [202.138.0.44]
> 2006-01-28 19:25:19 1F2l24-0000rB-2E Completed
>
>
> Then of course I realised why - the network hotkey.net.au has three MX
> hosts at 202.138.0.45, 202.138.0.46 and 202.138.0.44.
>
> This blew me away - what is the point of providing redundancy and
> scalability via MX, then those hosts each separately decide not to talk
> to you because of grey listing.
>
> Perhaps people doing grey listing should only have the one MX?
>
> I guess this is just another example of why grey listing is anti social
> - thankfully I'm not paying by data volume (many people in Australia
> still do) or I'd be more annoyed.
>
> I sent a message to the postmaster of the site and he had not realised
> it worked that way (I was surprised he answered - very rare for anyone
> to answer a postmaster message these days) - all he has done is
> whitelist my domain in whatever software he uses - good for me, but
> still poor for everyone else.
>
> Regards
> Paul
>


--
Venlig hilsen / Best regards
Lasse Birnbaum Jensen