On 23 Oct 2006, at 15:59, John Robinson wrote:
> On 23/10/2006 13:25, Ian Eiloart wrote:
>> --On 23 October 2006 12:57:00 +0100 John Robinson
>> <john.robinson@???> wrote:
>>> On 23/10/2006 09:57, Daniel Tiefnig wrote:
>>>> Yes. There is a problem with exims retry mechanism if a remote
>>>> system is
>>>> greylisting based on recipient address, sender address and
>>>> sender IP. As
>>>> exim gets a temporary error for "RCPT TO", it thinks the mailbox is
>>>> currently not available. Exim can't know that another e-mail in the
>>>> queue with a different sender address could actually get through
>>>> to the
>>>> recipient. With a moronic greylisting setup (no auto-
>>>> whitelisting) on
>>>> the remote side and a lot of emails this really is a problem.
>>>> One may
>>>> choose at which side the problem is, though.
>>> Is Exim designed to be clever, and not to attempt to deliver further
>>> messages to the same recipient? I thought it was just for hosts that
>>> were down, but I wonder if there's an option to disable this
>>> cleverness
>>> if it's not compatible with greylisting at remote sites.
>>
>> For the sending server to be able to do this, there'd need to be
>> some way
>> that the receiving server could announce that it was greylisting. For
>> example, an enhanced error code. U
>
> If it announced it was greylisting, the greylisting method would
> become
> less useful.
>
> I'm not clear that exim does defer all messages for a recipient after
> receiving a 4xx or whatever for one message, but if it does, I wonder
> whether I could I disable that feature, making exim behave more
> stupidly
> with some target servers but better with greylisting ones?
You could call exim without a -q option then run exim -qf on a cron
job (thats completely dumb queue handling)
Better would be to set up a retry rule for the specific error that
you get to retry every minute for 5 days.
NB this wont actually do a retry every minute, but it will do a retry
every queue run.
cf
http://www.exim.org/exim-html-4.50/doc/html/spec_32.html#SECT32.3
>
> Cheers,
>
> John.
>
>
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