On 2014-08-13, Valeri Galtsev <galtsev at 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 -- kkeller at wombat.san-francisco.ca.us