On Mon, 15 Jun 2009, Oli wrote:
> I have an interesting problem delivering large quantities of email to
> Hotmail and related addresses from Mailman. It seems like the sort of
> thing which would already have been solved but I can't spot it in the
> manuals.
>
> The problem comes from Exim being rather clever at keeping track of
> which hosts on a huge list of deliveries to use: it organises the
> deliveries in the best order to minimise the number of connections.
>
> What happens then is Hotmail will start 'temporarily' blocking every
> time I swamp it and it can take several days for deliveries to complete.
>
> The best I seem to be able to do it reduce the number of parallel
> deliveries, though what I'd really like to do is totally randomise the
> delivery pattern.
>
> The transport config below seems to be the best I can come up with from
> the docs, but I'm hoping there's something I've missed - has anyone else
> here tried this to Hotmail?
Not answering your question directly, but to make your life a bit easier
and allow more precise testing, what you might do is be more selective in
your router:
## Throttled forward to MX servers of arbitrary (non-local non-relay) domains
## This might not actually do any good, but it illustrates the idea
remote_domains_throttled:
driver = dnslookup
domains = +throttled_domains
transport = remote_smtp_remote_throttled
...
Then in the transport:
# This one is to certain off-campus hosts
remote_smtp_remote_throttled:
driver = smtp
connection_max_messages = 5
serialize_hosts = *
...
and populate +throttled_domains with suitable recipient domains (somewhat
experimentally, I have Yahoo and BTInternet domains in there).
Not sure you should need to be fiddling with the *_timeout options
though...
Jethro.
>
> Thanks very much in advance!
>
> Cheers,
> -Oli
>
>
>
> remote_smtp:
> driver = smtp
> hosts_avoid_tls = *
> # Timeout waiting for response to any command, including initial banner
> command_timeout = 15s
> # Timeout waiting for initial TCP connection
> connect_timeout = 20s
> # Timeout waiting for each data block to be transmitted
> # This defaults to five minutes. It is affected by message size
> # and our connection. We should be transmitting very small messages.
> data_timeout = 20s
> # Timeout waiting for final '.' of data connection.
> # May need to wait for virus/spam scanners here, so allow a bit more
> final_timeout = 30s
> # Send messages to the same host singularly. Hotmail and others
> # firewall us otherwise.
> max_rcpt = 1
> connection_max_messages = 1
> multi_domain = false
>
>
>
>
>
>
>
>
> --
> Oli Comber
> Systems Developer
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Jethro R Binks
Computing Officer, IT Services, University Of Strathclyde, Glasgow, UK
