Dave CROCKER wrote:
The lesson here is that any 'retransmission' scheme needs an exit
strategy, perhaps better thought of as a means of internally routing
around a blockage...
This was a main reason Fidonet had a mandatory ZMH (Zone Mail Hour)
routing requirement so that delivery was possible if going direct was
not possible was exhausted or it was listed as a private node in the
In the better Fidonet mailer, it was typical to have a scheduler with
very flexible routing rules, especially when POTS phone charges were
00-23 Route Mail directly
17-23 Route Mail directly if Area Code is not your Area Code
05-06 Route Mail via Network host (ZMH override)
SMTP attempts to emulate the need of "failure to directly connect"
with the recommendation to have at least two MX records with two
different SMTP host networks.
Question, do some telco return to have different rates with the mobile
business? Does anyone seen this happening more to reduce bandwidth
loads during the day vs night?