[geeks] ADMINISTRIVIA: Changes to mail delivery policies

[Scott Howard]

On Wed, Mar 13, 2002 at 03:12:36PM -0500, Greg A. Woods wrote:
> > Lets do the sums.  The actual number of SYN packets is going to be closer to
> > 6-8
> 
> WRONG.  Three per connection attempt.  Period.  Yes each MX will cause
> an additional connection attempt, but that's a second concern.  There
> may, or may not, be a returned ICMP error reply for each SYN packet.

Where the hell are you getting this from?

> Try checking your facts for a change.  A wee bit of patience and tcpdump
> will show you what happens.

Sure.

<<root at milliways />> snoop -tr -d le0 10.10.10.10 &
[1] 17934
<<root at milliways />> Using device /dev/le (promiscuous mode)
<<root at milliways />> /usr/ucb/mail -v test@[10.10.10.10]
Subject: test
test
EOT
<<root at milliways />> test@[10.10.10.10]... Connecting to [10.10.10.10] via esmtp...
  0.00000    milliways -> 10.10.10.10  SMTP C port=46742
  3.36265    milliways -> 10.10.10.10  SMTP C port=46742
 10.11281    milliways -> 10.10.10.10  SMTP C port=46742
 23.61573    milliways -> 10.10.10.10  SMTP C port=46742
 50.61692    milliways -> 10.10.10.10  SMTP C port=46742
104.61945    milliways -> 10.10.10.10  SMTP C port=46742
164.62224    milliways -> 10.10.10.10  SMTP C port=46742
224.62805    milliways -> 10.10.10.10  SMTP C port=46744
227.99514    milliways -> 10.10.10.10  SMTP C port=46744
234.74536    milliways -> 10.10.10.10  SMTP C port=46744
248.24639    milliways -> 10.10.10.10  SMTP C port=46744
275.24739    milliways -> 10.10.10.10  SMTP C port=46744
329.24984    milliways -> 10.10.10.10  SMTP C port=46744
389.25261    milliways -> 10.10.10.10  SMTP C port=46744
test@[10.10.10.10]... Deferred: [10.10.10.10]: No route to host

<<root at milliways />> /usr/lib/sendmail -qR[10.10.10.10]
479.31515    milliways -> 10.10.10.10  SMTP C port=46747
482.67694    milliways -> 10.10.10.10  SMTP C port=46747
489.42720    milliways -> 10.10.10.10  SMTP C port=46747
502.92816    milliways -> 10.10.10.10  SMTP C port=46747
529.92912    milliways -> 10.10.10.10  SMTP C port=46747
583.93156    milliways -> 10.10.10.10  SMTP C port=46747
643.93442    milliways -> 10.10.10.10  SMTP C port=46747


14 packets for the initial try.  7 packets by the time I gave up
monitoring the retry.  3 packets? I think not.

> If I'm not mistaken the very same mailer handles all your personal
> outgoing messages too.  You can't tune Postfix for just one user such as
> the "mailman" account-- the queue parameters affect all users equally.

I'd sorta guess Bill has already thought of this one (especially given that
he all but stated exactly that in the original message).

It's a mailing list. Get over it. (Repeating just to keep Amy happy :)

  Scott.