New way of spam?

[Koopmann, Jan-Peter]

> there are ways around this. Depends on your MTA - I can only speak for

> sendmail. If you use sendmail you can try milter-null, I found it
works 
> great, you'll need to install it on your outbound as well as your 
> inbound and share the "secret" between them.

Generally speaking: You just need to use the same watermarking mechanism
with the same secret for outgoing and incoming mails. No need for the
same boxes etc. But outgoing mail has to me watermarked correctly.