better blocking at MTA level (off-topic)

[Jason Ede]

On Saturday, May 26, 2007 10:17 AM "Koopmann, Jan-Peter"
<jan-peter at koopmann.eu> wrote: 

>Attention: Just because you choose 5 minutes does not mean there will
be
>a 5 minute delay. Most MTAs I know (at least old Exchange installations
>and yes there are dumb people out there using Exchange as the only
MTA!)
>use a 15 minute retry cycle. This results in at least 15 minutes delay
>if not more. And we have several clients not liking that idea. :-(

All of our customers use authenticated smtp for outgoing so that's not
stuck. Fortunately we can live with the 5 or 15min delay of incoming
email for 'new' senders/recipients. Fortunately for us the email that
needs to get through quickly tends to be from people they already know.
15minutes is not long a delay for email to get there and that delay
could just have easily been caused by a temporary dns lookup failure in
the outgoing exchange server... As it is a one off hit then it generally
tends not to be a problem...


 
 

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