peter at farrows.org
Wed Apr 23 20:42:58 IST 2008
is there a way of watermarking without having the full blown mailscanner
My clients email out through their Linux firewall/smarthosts, but the
return mail comes back through a cluster of scanners.
Watermarking here causes them not to receive delivery failure reports,
unless they smarthost outgoing through my servers which I don't want to
do for volume reasons.
What I would like to do is use a sendmail milter of some description, on
the clients outbound relays, to add a watermark generated from the same
"secret" which my scanners can verify if it comes back through the
mailscanner servers as a failure notice.
If the answer is no, I'll build a cluster of outgoing only customer
relays with Mailscanner on them and get all clients to use it as a
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