Eric wrote:
>
> But it doesn't offer any speed-up, since you need to resend the entire
> message data every time, ie MAIL FROM, RCPT, DATA, MAIL, RCPT, DATA and
> so forth. It also means Lyris will require significantly more bandwidth
> than competing products.
Quite. I am currently moving my mailing list of 3200 subscribers
(3100 of them on the daily digest version which is typically 40k in
size) to my own machine (an overpowered P166) to reduce load on my
previous host site. I am paying for a dedicated 28.8kpbs link and
have permission to use the host site as a mail relay.
I've been experimenting with various MTAs and tried qmail, which is
incapable of multiple RCPTS but has other good features. I did a
test, sending out 40k message to all 3200 subscribers. One pass
through the addresses took 8.5 hours, totally tying up the 28.8 line
at full bandwidth. About 200 addresses were queued for resending.
I switched to exim (another MTA) which does multiple RCPTS and used my
relay host. Transit time over my link: 15 minutes. I was able to do
other ppp activity over my line during this 15 minutes.
Perfect bounce processing is a worthy goal (though I would personally
chose qmail's envelope from encoding over To: header rewriting). I
use Smartlist for precisely this reason: it handles about 95% of the
bounces automatically. In my case, using a product which handled this
remaining 5% is not worth 34+ times as much bandwidth usage.
--
Michelle Dick artemis@rahul.net East Palo Alto, CA
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