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Hi folks,
The ISP in the Netherlands that I'm currently working for, want me to implement
a scalable, high available (load balancing) mailserver. I have been looking
around and think the best way to do this is by having a daemon listen to port
110 (POP3). This daemon will first ask the user's name and then handle the
traffic between the selected mailserver (the one with, for example, the lowest
traffic) and the user. I have a few questions, maybe you folks can help me:
- Since this daemon will be a SPOF (single point of failure), what do I have to
pay extra attention to?
- Am I right when I think that there will be a maximum of 30,000 users at the
same time (since the daemon will have to open both sockets to the user and the
mailserver)? Can DNS be used as a solution for this?
- Does anyone know of a daemon (or any software in general) that does something
similar to what I want to do or an URL with more info on this subject (POP3
specific)?
Any help is appreciated!
Greetings, Norbert de Jonge
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