Hi Thomas,
Having the same issue, they are sending the email through a no reply email
address. You need to change the address in the To field from
[email protected] to [email protected].
I have no idea why they didn't add a Reply-To header to their email.
[Regards,]
Areeb Majeed
Co-founder,
Maileroo
[icon] maileroo.com [icon] [email protected]
[facebook](https://facebook.com/maileroo)
[linkedin](https://www.linkedin.com/company/maileroo/)
[twitter](https://twitter.com/maileroodotcom)
[__tpx__]
Maileroo Group Pty Ltd| Level 10, 440 Collins Street, Melbourne VIC 3000
> On 6/05/2026 7:17:17 PM, [email protected]
> <[email protected]> wrote:
>
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> Today's Topics:
>
> 1. Suspect DKIM failure to Microsoft destination (Hello Maildrop)
> 2. Re: Suspect DKIM failure to Microsoft destination
> (Randolf Richardson, Postmaster)
> 3. Re: Suspect DKIM failure to Microsoft destination
> (Olivier Moulene)
> 4. Outlooksupport, Relay Access Denied? (Thomas Walter)
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 6 May 2026 08:57:41 +0200
> From: Hello Maildrop
> To: mailop
> Subject: [mailop] Suspect DKIM failure to Microsoft destination
> Message-ID:
>
> Content-Type: text/plain; charset="utf-8"
>
> Hello,
>
> One of my customer, hosted at Google workspace, have recurrent problem when
> sending to some addresses at live.fr or hotmail.com
>
> The messages bounce back indicating a DKIM failure, however the messages
> sended are well signed. Delivery to other destinations enforcing DKIM/DMARC
> does not cause any problems (Gmail, Orange)
>
> 550 5.7.515 Access denied, sending domain MISSEGLE.COM doesn't meet the
> required authentication level. The sender's domain in the 5322.From address
> doesn't meet the authentication requirements defined for the sender. To
> learn how to fix this see: https://go.microsoft.com/fwlink/p/?linkid=2319303
> Spf= Pass , Dkim= Fail , DMARC= Pass [AM8P189MB1234.EURP189.PROD.OUTLOOK.COM
> 2026-05-06T05:21:48.296Z 08DEAAD6427386FD] [
> DU2PR04CA0024.eurprd04.prod.outlook.com 2026-05-06T05:21:48.305Z
> 08DEAAEBE699717D] [DB1PEPF000509FE.eurprd03.prod.outlook.com
> 2026-05-06T05:21:48.308Z 08DEA716CB8BDD0A]
>
> I can't identify the cause of this problem, do you have any ideas?
>
> *TOUREL David*
>
> *MAILDROP*
> 17 ch de la Longuié - 81210 MONTFA
>
> Tél : 05 63 51 07 79
> Retrouvez-nous sur Twitter @maildrop_fr
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
>
> ------------------------------
>
> Message: 2
> Date: Wed, 6 May 2026 00:16:42 -0700
> From: "Randolf Richardson, Postmaster"
>
> To: mailop , Hello Maildrop
> Subject: Re: [mailop] Suspect DKIM failure to Microsoft destination
> Message-ID: <[email protected]>
> Content-Type: text/plain; charset=ISO-8859-1
>
> The DMARC policy for MISSEGLE.COM is set to "none":
>
> v=DMARC1;
> p=none;
> pct=100;
> rua=mailto:[email protected];
> sp=none;
> aspf=r;
>
> If it's set to "p=quarantine" or "p=reject" then that may help
> because some systems consider "p=none" to be as useful as not having
> a DMARC policy at all.
>
> We use "p=reject" on all of the domains we host eMail for, and what
> it means is that forgeries are blocked during the SMTP session with a
> 5yz (permanent) status code. (Using "p=quarantine" means that forged
> messages should still be accepted, but flagged for quarantine, such
> as moving into a users "spam" folder.)
>
> Also, if you don't set "sp" then it will default to whatever you set
> "p" to (just in case you'd like to simplify things slightly).
>
>> Hello,
>>
>> One of my customer, hosted at Google workspace, have recurrent problem when
>> sending to some addresses at live.fr or hotmail.com
>>
>> The messages bounce back indicating a DKIM failure, however the messages
>> sended are well signed. Delivery to other destinations enforcing DKIM/DMARC
>> does not cause any problems (Gmail, Orange)
>>
>> 550 5.7.515 Access denied, sending domain MISSEGLE.COM doesn't meet the
>> required authentication level. The sender's domain in the 5322.From address
>> doesn't meet the authentication requirements defined for the sender. To
>> learn how to fix this see: https://go.microsoft.com/fwlink/p/?linkid=2319303
>> Spf= Pass , Dkim= Fail , DMARC= Pass [AM8P189MB1234.EURP189.PROD.OUTLOOK.COM
>> 2026-05-06T05:21:48.296Z 08DEAAD6427386FD] [
>> DU2PR04CA0024.eurprd04.prod.outlook.com 2026-05-06T05:21:48.305Z
>> 08DEAAEBE699717D] [DB1PEPF000509FE.eurprd03.prod.outlook.com
>> 2026-05-06T05:21:48.308Z 08DEA716CB8BDD0A]
>>
>> I can't identify the cause of this problem, do you have any ideas?
>>
>> *TOUREL David*
>>
>> *MAILDROP*
>> 17 ch de la Longuié - 81210 MONTFA
>>
>> Tél : 05 63 51 07 79
>> Retrouvez-nous sur Twitter @maildrop_fr
>>
>
> --
> Postmaster - [email protected]
> Randolf Richardson, CNA - [email protected]
> Inter-Corporate Computer & Network Services, Inc.
> Vancouver, Beautiful British Columbia, Canada
> https://www.inter-corporate.com/
>
> ------------------------------
>
> Message: 3
> Date: Wed, 6 May 2026 09:49:26 +0200
> From: Olivier Moulene
> To: [email protected]
> Subject: Re: [mailop] Suspect DKIM failure to Microsoft destination
> Message-ID:
> Content-Type: text/plain; charset="utf-8"
>
> An HTML attachment was scrubbed...
> URL:
>
> ------------------------------
>
> Message: 4
> Date: Wed, 6 May 2026 11:02:06 +0200
> From: Thomas Walter
> To: [email protected]
> Subject: [mailop] Outlooksupport, Relay Access Denied?
> Message-ID:
> Content-Type: text/plain; charset="utf-8"
>
> Hello mail peoples,
>
> two of my servers are on MS blocklist for unknown reasons. SNDS says
> `All of the specified IPs have normal status`, JMRP only had the
> occasional false-positive.
>
> 550 5.7.1 Unfortunately, messages from [185.149.214.63] weren't sent.
> Please contact your Internet service provider since part of their
> network is on our block list (S3150).
>
> I've used the postmaster form to ask for mitigation, received the
> auto-reply and tried to reply to escalate, but received the following error:
>
> : host
> sponaeop.mail.protection.outlook.com[52.101.10.1] said: 550 5.7.64
> TenantAttribution; Relay Access Denied
> [BN2PEPF000044A1.namprd02.prod.outlook.com 2026-05-06T08:45:31.059Z
> 08DEA7410A480943] (in reply to RCPT TO command)
>
> I am confused why I'd get a "Relay Access Denied" error?
>
> Regards,
> Thomas Walter
>
> --
> Thomas Walter
> Datenverarbeitungszentrale
>
> FH Münster
> - University of Applied Sciences -
> Corrensstr. 25, Raum B 112
> 48149 Münster
>
> Tel: +49 251 83 64 908
> Fax: +49 251 83 64 910
> www.fh-muenster.de/dvz/
>
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> End of mailop Digest, Vol 70, Issue 8
> *************************************
> @outlook.mail.microsoft>@fh-muenster.de>@fh-muenster.de>@postmastery.net>@postmastery.net>@maildrop.fr>@mailop.org>@inter-corporate.com>[email protected]>@mailop.org>@maildrop.fr>
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