I would like to share my view on this topic
For example, if you send 50 emails to yahoo domain, as per my knowledge
qmail takes 50 connections to same remote server and delivers the message.
Of-course yahoo limits the connection from single IP.
So what i want to add here is, if there is 50 emails. As yahoo has many
backup MX servers, what qmail has to do is
it should check for the secondary mx servers and delivers message like
10 emails on each server.
With Regards
Vinay
On Wed, Jul 7, 2010 at 11:48 AM, Martin Waschbuesch
<[email protected]>wrote:
>
> Am 06.07.2010 um 22:55 schrieb Tonix (Antonio Nati):
> >> Also note that, if you send one mail to 50 recipients, this will result
> in 50 individual items in the queue. As long as but one of these items is
> still unsent, qmailctl queue will list all 50 items as still being in the
> queue but will indicate with each item if said item has been sent. Once all
> items belonging to the message have been sent, they'll all no longer be
> shown in the queue. Is that the behavior you see when saying some messages
> need a long time to send?
> >>
> >>
> > If I send to 50 recipients on the same remote domain, I will have 50
> connections opened to the same remote server...
> > So, if remote server has limit on new connections, some deliveries will
> abort and retry nextly.
>
> Very true. You could use your number of concurrent connections more
> effectively when each was used to transmit more than one message. But of
> course this (if anyone actually were to rewrite the way qmail's queuing
> works) would only be a relief and eliminate the problem: Depending on the
> allowed chunk size (messages per session allowed for a given target domain)
> and the number of messages sent to that domain, you might still end up being
> 'tarpit'ed.
> But I guess the whole discussion is a moot point in so far as there is
> (afaik) no such patch for qmail in existence.
>
> Martin
>
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