The mailing list for listmasters using Sympa

[Serge Aumont <address@concealed>]

Paul Menzel wrote:
> Dear list,
>
>
> on [1] the process for message distribution is explained. I have one
> question regarding the graphic. The cross point to the outgoing MTAs is
> in the box representing the computer sympa.pl runs on? So a simple
> outgoing MTA needs to be running on this server which relays messages to
> a relay host? This is also what point 8 says. 
>
>         Smart hosts. The outgoing MTA agent is called by Sympa in order
>         to distribute messages. This MTA can be configured to relay any
>         message to a smart host. This simple configuration will make
>         SMTP process running on the same host as sympa.pl really simple
>         and fast. The smart host can be a cluster of servers using round
>         robin DNS.
>
> So to make it more clear should a small box labeled outgoing MTA be
> inside the gray box and the boxes with outgoing MTA be renamed to relay
> MTA? Or do I miss something and this would not be necessary?
>
>   
Before Sympa 6, a MSA is required on the host running sympa.pl . This
MSA is used by sympa.pl in order to submit messages to SMTP
infrastructure (it does not use SMTPAUTH but it is a MSA because it is
the first server who receive the message from Sympa and Sympa is not a
MTA. For big configurations, it recommended to configure the MSA with a
"smart_host". Every mails are relayed to the smart host very quickly.
The smart_host perform a more complex process because it deal with DNS,
slow remote host, spools hundling etc.
You can run it on a cluster just using round robin DNS if this process
become very big as describe in figure #1, but for hugue Sympa
installation you may want to move the MSA to another hosts. That's what
is now possible with Sympa 6 and describe in figure #2.

Hope that's help.
Serge