On 16.8.2012, at 10.02, Cor Bosman wrote:
I'm also considering implementing an SMTP submission server, which works only as a proxy to the real SMTP server. The benefits of it would mainly be:
What would be really cool is if you also kept statistics on certain metrics, like how many emails a specific sender has sent. If this is done right, it could become a centralised spam sender back-off system over multiple smtp servers. Maybe something for the future. We now pay $$$$ for a commercial system that implements this.
The submission servers would need to share state with each others to make this reliable. Some nosql database would work for that I guess (memcached?)
Can you describe more fully what you would want it to do and/or what the current system does? Probably not something I'll implement soon, but would be good to know for future :)