Message-ID:

According to the latest official figures, 43% of all statistics are totally worthless.

computers / comp.mail.sendmail / Re: WARNING EXTERNAL SENDER

WARNING EXTERNAL SENDER

<3394fd4e-a84b-4a03-9f1e-22afe7397678n@googlegroups.com>

https://www.novabbs.com/computers/article-flat.php?id=253&group=comp.mail.sendmail#253

copy link Newsgroups: comp.mail.sendmail

X-Received: by 2002:a37:7c7:: with SMTP id 190mr404292qkh.269.1628097042896;
Wed, 04 Aug 2021 10:10:42 -0700 (PDT)
X-Received: by 2002:a25:d290:: with SMTP id j138mr433237ybg.151.1628097042548;
Wed, 04 Aug 2021 10:10:42 -0700 (PDT)
Path: i2pn2.org!i2pn.org!weretis.net!feeder8.news.weretis.net!proxad.net!feeder1-2.proxad.net!209.85.160.216.MISMATCH!news-out.google.com!nntp.google.com!postnews.google.com!google-groups.googlegroups.com!not-for-mail
Newsgroups: comp.mail.sendmail
Date: Wed, 4 Aug 2021 10:10:42 -0700 (PDT)
Injection-Info: google-groups.googlegroups.com; posting-host=115.113.208.65; posting-account=lIjIkgoAAADepOZYQo-ze7EdH-p8DKvj
NNTP-Posting-Host: 115.113.208.65
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <3394fd4e-a84b-4a03-9f1e-22afe7397678n@googlegroups.com>
Subject: WARNING EXTERNAL SENDER
From: s.sriniv...@gmail.com (srinivasa gowd)
Injection-Date: Wed, 04 Aug 2021 17:10:42 +0000
Content-Type: text/plain; charset="UTF-8"

by: srinivasa gowd - Wed, 4 Aug 2021 17:10 UTC

Hello,
We are using Sendmail - 8.14.7-4.el7, please helps us to configure
to add external email warning messages to prevent email spoofing like

WARNING: This email originated from outside of the organization.

Srinivasa

Re: WARNING EXTERNAL SENDER

<ba9e1b8a-ed28-4659-bd2d-fcaf82794f66n@googlegroups.com>

copy mid

https://www.novabbs.com/computers/article-flat.php?id=267&group=comp.mail.sendmail#267

copy link Newsgroups: comp.mail.sendmail

X-Received: by 2002:ac8:5845:: with SMTP id h5mr18002326qth.91.1629467007756;
Fri, 20 Aug 2021 06:43:27 -0700 (PDT)
X-Received: by 2002:a25:ab47:: with SMTP id u65mr26275072ybi.193.1629467007475;
Fri, 20 Aug 2021 06:43:27 -0700 (PDT)
Path: i2pn2.org!i2pn.org!weretis.net!feeder8.news.weretis.net!proxad.net!feeder1-2.proxad.net!209.85.160.216.MISMATCH!news-out.google.com!nntp.google.com!postnews.google.com!google-groups.googlegroups.com!not-for-mail
Newsgroups: comp.mail.sendmail
Date: Fri, 20 Aug 2021 06:43:27 -0700 (PDT)
In-Reply-To: <3394fd4e-a84b-4a03-9f1e-22afe7397678n@googlegroups.com>
Injection-Info: google-groups.googlegroups.com; posting-host=115.113.208.65; posting-account=lIjIkgoAAADepOZYQo-ze7EdH-p8DKvj
NNTP-Posting-Host: 115.113.208.65
References: <3394fd4e-a84b-4a03-9f1e-22afe7397678n@googlegroups.com>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <ba9e1b8a-ed28-4659-bd2d-fcaf82794f66n@googlegroups.com>
Subject: Re: WARNING EXTERNAL SENDER
From: s.sriniv...@gmail.com (srinivasa gowd)
Injection-Date: Fri, 20 Aug 2021 13:43:27 +0000
Content-Type: text/plain; charset="UTF-8"

by: srinivasa gowd - Fri, 20 Aug 2021 13:43 UTC

On Wednesday, August 4, 2021 at 10:40:43 PM UTC+5:30, srinivasa gowd wrote:
> Hello,
> We are using Sendmail - 8.14.7-4.el7, please helps us to configure
> to add external email warning messages to prevent email spoofing like
>
> WARNING: This email originated from outside of the organization.
>
> Srinivasa

Hello All,
Expecting a reply on my requirements. Is it possible to configure an
"[EXTERNAL EMAIL] Please be cautious when opening links or attachments in the email, DO NOT open when not sure." in Sendmail.
Thanks
Srinivasa

Re: WARNING EXTERNAL SENDER

<sfolpo$37l$1@news.misty.com>

copy mid

https://www.novabbs.com/computers/article-flat.php?id=268&group=comp.mail.sendmail#268

copy link Newsgroups: comp.mail.sendmail

Path: i2pn2.org!i2pn.org!aioe.org!news.uzoreto.com!tr2.eu1.usenetexpress.com!feeder.usenetexpress.com!tr3.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!news-vm.kithrup.com!news.misty.com!.POSTED!not-for-mail
From: INVALID_...@esmtp.org (Claus Aßmann)
Newsgroups: comp.mail.sendmail
Subject: Re: WARNING EXTERNAL SENDER
Date: Fri, 20 Aug 2021 16:38:16 +0000 (UTC)
Organization: MGT Consulting
Lines: 20
Sender: <ml+sendmail(-no-copies-please)@esmtp.org>
Message-ID: <sfolpo$37l$1@news.misty.com>
References: <3394fd4e-a84b-4a03-9f1e-22afe7397678n@googlegroups.com>
NNTP-Posting-Host: kiel.esmtp.org
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Trace: news.misty.com 1629477496 3317 195.244.235.220 (20 Aug 2021 16:38:16 GMT)
X-Complaints-To: abuse@misty.com
NNTP-Posting-Date: Fri, 20 Aug 2021 16:38:16 +0000 (UTC)
Mail-Copies-To: never
X-Newsreader: trn 4.0-test77 (Sep 1, 2010)
Originator: ca@x2.esmtp.org (Claus Assmann)

by: Claus Aßmann - Fri, 20 Aug 2021 16:38 UTC

srinivasa gowd wrote:

> We are using Sendmail - 8.14.7-4.el7, please helps us to configure
> to add external email warning messages to prevent email spoofing like

> WARNING: This email originated from outside of the organization.

You could write some custom rules to modify headers if you really
think this makes sense. doc/op.* explains how rules work, and you
can find a lot of examples online.

An alternative is to use DKIM signing which would probably be more
appropriate.

--
Note: please read the netiquette before posting. I will almost never
reply to top-postings which include a full copy of the previous
article(s) at the end because it's annoying, shows that the poster
is too lazy to trim his article, and it's wasting the time of all readers.

Subject	Author
WARNING EXTERNAL SENDER	srinivasa gowd
Re: WARNING EXTERNAL SENDER	srinivasa gowd
Re: WARNING EXTERNAL SENDER	Claus Aßmann