On 2014-08-13, Valeri Galtsev galtsev@kicp.uchicago.edu wrote:
Building decent mail server with good spam filtering is different story, and requires some system administration knowledge.
Building a decent public SMTP server with good spam filtering *that does not originate spam itself* and *does not silently lose mail* is a hugely different story, and requires more than simply "some system administration knowledge". It requires a solid understanding of SMTP as well as the software involved, some knowledge of IP networks and DNS, and constant vigilance on the anti-spam sites to ensure you're not originating spam. Someone unable or unwilling to do these things should not expose their SMTP server to the public.
--keith