On 16/08/2012 08:02, 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.
Postfix allows you to write policy agents very simply. I wrote a small
perl utility which uses a database to count the number of emails a user
has sent in the last 1 and 24 hours. Based on that we throttle users (I
have some fudging for recipients per email also). If you like the idea
then it's about 10 lines of perl (+ a decent chunk of boiler plate).
Ed
