Watermarking quirks still in 4.62.8

[Randal, Phil]

A couple of issues with watermarking:

1: Read receipts are getting blocked ("spam(no null-header or sender
address)")

2: If I send an email from outside to a non-existent email address here,
the bounce message from our Exchange server gets blocked.  I've worked
around this using a ruleset, but shouldn't MailScanner be letting
through bounces originating from the internal network (or RFC1918
addresses) anyhow?

Cheers,

Phil

--
Phil Randal
Network Engineer
Herefordshire Council
Hereford, UK