On Oct 23, 2017, at 12:27 AM, Poliman - Serwis <ser...@poliman.pl> wrote:
Ok, I make a mistake, because I didn't say about for what will be use "do not
reply". So - I work in IT company. Developers make different applications and these
applications send mainly confirmation emails, also reminder password emails. These emails
should only be send and receiver could not answer this email with success. That's all. I
use ISP config with postfix.
On 23.10.17 01:51, Viktor Dukhovni wrote:
You need to take the time to understand the distinctions between:
1. The message envelope sender
2. The RFC2822 "From:" message header
3. The RFC2822 "Reply-To:" message header
The email address used in (1) MUST be valid, and your system
must accept email back to this address.
actually, the address can be null: <> and bounces must not go to that
address. The downside is that some systems/spam filters may reject it.
You can choose to
discard it, but for auto-generated traffic it is really best
practice, and important for ongoing deliverability to implement
a proper automated bounce processor for replies to this address.
It is should use VERP or similar to make it maximally likely
that you can identity the target recipient that elicited the
bounce.
The email address used in "2", gives the recipient some sense
of who the message is from. This can be a mailbox that
rejects all replies, but is better to use:
From: "Example Corp password reset robot (please do not reply)"
<supp...@example.com>
Reply-To: "Example Corp no reply mailbox" <nore...@example.com>
So that most replies bounce, but some folks can choose to manually
override reply-to and send mail to "supp...@example.com".
I am not sure if some autoreplies won't use From: addresses even if this
case. but I am sure most OOO responders will send the mail to one of those
addreses even if the "1" address is null.
However one canusualy add headers as "Precedence: bulk", and
"Auto-Submitted: auto-generated" to avoid these cases as much as possible.
The email address in (3) can be a non-deliverable address that is always
rejected.
but I still would not recommend that...
--
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