On 10/08/2014 09:14 PM, R P Herrold wrote:
On Wed, 8 Oct 2014, Gordan Bobic wrote:
That's dangerous and may result in mail being completely
undeliverable as well as leave it open to malicious
redirection.
but 'completely undeliverable' is the sender's problem, not
mine
It's your problem if you want to receive email from them. Their
configuration is legitimate.
I don't see 'malicious redirection' here. email as generally
set up is no more secure or private than a post card. What
'malice' opportunity against something on MY side of the
demarc do you see?
Somebody could set up a malicious server on the RFC1918 address on their
side to intercept their mail to you.
without ever attempting being delivered to the recipient
using nolisting.
still the sender's problem
Only if you don't care about receiving email from them. If you break
your DNS, why is it their problem?
To make it work properly and reliably, you need proper valid IPs you control.
You cannot rely on every possible sender to not be sending from a network
where the RFC 1918 you configure won't be a mail server.
This is not on my side of the demarc. Not my problem
By induction of that logic, don't have any MX records and don't receive
any email at all. If somebody wants to send you email it's not your problem.
Gordan
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