Re: [OT] email address at bottom of posts
Re: [OT] email address at bottom of posts
- Subject: Re: [OT] email address at bottom of posts
- From: Fabian Wenk <email@hidden>
- Date: Fri, 17 Aug 2012 18:51:19 +0200
Hello Jonas
On 17.08.2012 18:15, Jonas Maebe wrote:
The email address of the recipient is added below every
message sent via Apple's mailing lists. This was instated many
years ago (somewhere between 30 August 2004 and 29 October
2004, according to my mail archive). It makes it easier for
mailing list administrators to figure out which subscribed
address is bouncing in case of email forwarding.
Mailman itself is quite good with handling bounces and can
suspend (after a soft error has occurred for to long, e.g.
mailbox full) or remove subscribers (after hard errors, like user
unknown) automatically.
An other feature of e-mail helps with this very good. E-mails
have two different "From" addresses. One is in the envelope
("Sender:" or "Return-Path:" header line), which proper mail
server software (MTA, mail transfer agents) is using for bounces.
In case of this mailing list, it is set to
'x11-users-bounces+user=email@hidden'
(user=example.com is replaced with your e-mail address, but with
= instead of @). So if Mailman is receiving e-mails to this
address, it knows which mailing list and which subscribed e-mail
address caused the error.
The second "From" is the one in the "From:" header line which is
displayed and used in your mail client (MUA, mail user agent). On
mailing lists this usually is set to the e-mail address of the
original sender (e.g. mine), so a private reply could be done easily.
On normal private direct e-mails, usually both (envelope and
header) "From" are set with the e-mail address which is
configured in your MUA. It is even this way until the mailing
list server does redistribute (forward) your e-mail to all the
subscribers and then is setting a new envelope "From".
PS: Sorry for my two longer off topic postings.
bye
Fabian
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