Stefan Palme wrote:
Hi all,

I've reconfigured our website email system, so auto-generated emails
now have a valid From: and Reply-To: header ([EMAIL PROTECTED]) and use
an alternate envelope-FROM ([EMAIL PROTECTED]).

Now I have seen a lot of auto-reply mails (aka "I am on holidays and
back in september"). These mails are being sent to the info-bounces
address, i.e. the original envelope FROM.

Is this the expected behaviour for this kind of auto replies?

yes. This way, you can setup a program to handle mail sent to info-bounces and have it parse the message and ignore it if it's a vacation message.... etc.



More general: is there a written rule, when to send emails to the
Return-Path, when to "Reply-To:" and when to "Errors-To" ?

There is some level of disagreement, but it is a good practice to send auto-replies to the envelope sender.

Reply-To is for "people" (not for robots). if user replies to a message, then reply-To is preferred, and if not, From header.

Errors-To has never been standardized and is "discouraged".

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