>IMail just seems to take forever to que the messages when there are a
>large number of recipients
Actually, the problem that people usually have only occurs after there are
a lot of E-mails in the queue.
When an E-mail arrives, IMail starts an SMTP process to deliver the
E-mail. If all E-mail is successfully delivered, there will never be any
E-mail in the queue. However, if the E-mail can't be delivered (due to a
problem on the remote end, such as the mail servers being unreachable, or a
problem on your end, such as your DNS server down), only then will the
E-mail go into the queue.
IMail then starts a new SMTP process every 30 minutes or so, and it goes
through the queue and retries each E-mail.
This process works well until there are a huge number of E-mails in the
queue. When this happens, you only have that 1 SMTP process trying to send
them all in serial. That means that it has to wait until one is delivered
or fails before it can try the next one. This is unlike the normal
delivery process, where you often have multiple SMTP processes to send out
the E-mail in parallel, which speeds up delivery.
If you see this occur, it is simple to get the mail out quicker: Just use
the IMail Administrator or web messaging and click on the "Send All" button
about 10-20 times. It looks like nothing happens when you click the "Send
All" button, but it really starts a new SMTP process to deal with the
queue. So, if you hit the button 10 times, you'll have 10 SMTP processes
handling the queue, and it will get through the backup much faster.
-Scott
Declude: Anti-spam and Anti-virus solutions for IMail. http://www.declude.com
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