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550 5.7.0 bad DKIM signature data (in reply to end of DATA command) #3765
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@mattly6 DKIM is something that must be configured on your server side. There is a website that helps you to test you email and see what can be wrong to not have a 10/10 score. You can also use the following website to check your email health: https://mxtoolbox.com/emailhealth I hope this info(s) will help you to figure out what can be wrong. |
Thank you, I've contacted our mailing services provider and am looking for further assistance. Hopefully it's going to solve our problems. |
I'm still waiting for the response from mailing services provider, but I noticed a weird thing. So that's a PASS: "Delivered-To: my@mail.com
=09=09 =09
<a href=3D"mailto:our@company.mail">our@company.mail
And that one is a FAIL:
Received: by 2002:a05:6520:303:b0:285:9997:51b0 with SMTP id gk3csp269263lkb;
<< CONTENT HERE >>
<a href=3D"mailto:our@company.mail">our@company.mail
|
Hi,
So about two weeks ago we started receiving bounce messages from a number of our customers.
Those are a minority - 50 messages in the last two weeks out of almost 3k sent messages, but it's annoying enough to try and do something about it.
The messages get bounced by the same set of recipients, no randomness here - if I know the message sent to a customer got bounced in the past, it's certain it would get bounced again.
We are running and accessing Freescout via Zerotier virtual network - could this be the problem here?
So far it worked like a charm and there were no issues with DKIM at all.
We're sending messages via SMTP with TLS, receiving via IMAP with SSL.
When sending the message through mail service provider's website, the messages don't get bounced.
This is an example (anonymised) bounce message received from our mail services provider:
[Automatically generated message]
We are sorry to inform that your mail message was not delivered to one
or more recipients. Its fragment is attached to this e-mail.
You can find the error message below.
__
customer@mail.com: host customer.domain.com[<>]
said: 550 5.7.0 bad DKIM signature data (in reply to end of DATA command)
Return-Path: freescout@mail.com
Received: from mmw7.pf.interia.pl (unknown [10.217.1.86])
by smtpo.poczta.interia.pl (INTERIA.PL) with ESMTP id B5DD55C86B
for customer@mail.com; Mon, 5 Feb 2024 09:46:19 +0100 (CET)
Received: from fmi6.pf.interia.pl (fmi6.pf.interia.pl [127.0.0.1])
by poczta.interia.pl (INTERIA.PL) with ESMTP id 959CAE02F4
for customer@mail.com;
Mon, 5 Feb 2024 09:46:19 +0100 (CET)
X-Interia-R: Interia
X-Interia-R-IP: <>
X-Interia-R-Helo: <[172.30.18.39]>
Received: from [172.30.18.39] (unknown [<>]) (using TLSv1.2
with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested)
by interia.eu (INTERIA.PL) with ESMTPSA
for customer@mail.com;
Mon, 5 Feb 2024 09:46:19 +0100 (CET)
Message-ID: reply-84157-616661a471e273db@domain.com
Date: Mon, 05 Feb 2024 09:46:18 +0100
Subject: Re: Subject
From: Freescout Helpdeskfreescout@mail.com
To: "customer@mail.com Customer"
customer@mail.com
MIME-Version: 1.0
X-FreeScout-Mail-Type: customer.message
References: a1b74145-a96d-4fdb-8413-f55820ab2168@clientdomain.com
reply-80147-74345df26b3418fb@domain.com
reply-80155-42ea94d52b0865ba@domain.com
In-Reply-To: a1b74145-a96d-4fdb-8413-f55820ab2168@clientdomain.com
X-IPL-Priority-Group: 0-0
X-Interia-Antivirus: OK
X-EMID: 8f755bf8
Content-Type: multipart/mixed; boundary="C8F18A410C892D3E416A9D19ED4BC99A"
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=interia.pl;
s=biztos; t=1707122779;
bh=eic7yjgFjj4zulXXSJMCSELGskp/fm+buBlQ4N7uyeE=;
h=Message-ID:Date:Subject:From:To:MIME-Version:Content-Type;
b=HMoOjxHciixBE3k1KNYGGJnlOcJ+js3gSlLVh/hm9s9oh9qmLjrnH6N02sXX2DgjC
ZbbnRoRaImDXoc+7AqzZfoIt10g7AYyENMsl5fAoEdQIbOk2wYQGD+/xu6mA0RrOCN
LfPwSRGhqDIGWUmRr2udtChxrmZsM8pny3sRClAk=
PHP version: 8.1.2-1ubuntu2.14
FreeScout version: 1.8.120
Database: MySQL
Are you using CloudFlare: No
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