Re: [mailop] Contact Mimecast.com Postmaster - Sending Problems

[Benny Pedersen via mailop]

Nikolas Bauer via mailop skrev den 2023-03-16 11:32:


SMTP error from remote server for RCPT TO command, host:
au-smtp-inbound-2.mimecast.com (124.47.150.26) reason: 550
Administrative prohibition - envelope blocked -
https://community.mimecast.com/docs/DOC-1369#550 [1]
[Xwi6G9SYM7adxsiZUWh3pw.au54]



Anyone got some direct contacts?


550 Administrative prohibition envelope blocked
The sender's email address or domain has triggered a Blocked 
Senders Policy or there's an SPF hard rejection.
Delete or modify the Blocked Senders policy to exclude the 
sender address.


follow the url helps

ensure sender have not shared ip, and is dkim signed, setup dmarc poliy 
none, and feedback to see how it goes


gmail have a spf with 30 + ipv4 and i still see spam mails with spf 
fails


hmm :)




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[mailop] Microsoft send broken A-R header

[A. Schulze via mailop]

Hello,

we use OpenDKIM to validate DKIM signatures for inbound messages. Works so far 
as usual.
Of course, OpenDKIM add Authentication-Results header as defined per RFC 7601.
Before adding such header, OpenDKIM test any existent Authentication-Results 
header if it
pretend to be generated from $self. Such Authentication-Results header are 
removed.

So OpenDKIM have to parse Authentication-Results header. It happen, that some 
messages contain
headers not conform RFC 7601. Also as usual: such condition trigger a warning.

Now it happen we receive many messages from microsoft/outlook.com/office365/...
Virtually all messages trigger a warning: "failed to parse authentication-results: 
header field"

This is the code: 
https://github.com/trusteddomainproject/OpenDKIM/blob/5c539587561785a66c1f67f720f2fb741f320785/opendkim/opendkim.c#L13439-L13463

Setting the OpenDKIM option 'KeepAuthResults' 
(https://github.com/trusteddomainproject/OpenDKIM/blob/5c539587561785a66c1f67f720f2fb741f320785/opendkim/opendkim.conf.5.in#L326-L328),
 OpenDKIM do not try to remove existing Authentication-Results header and this 
way we found the header triggering the warning:

```
authentication-results: dkim=none (message not signed)
 header.d=none;dmarc=none action=none header.from=example.com;
```

This is clearly violating RFC 7601, the authserv-id is missing.

Is this a known fault?

Andreas
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[mailop] Hey GroupOn, want to fix your message ID generator??

[Michael Peddemors via mailop]

Message-ID: 
<934542802.10812.1678919922311.javamail.r...@rocketman-commercial--email-consumer--default-56.hbu-svc-rocketman-commercial--email-consumer--default.rocketman-commercial-production.svc.cluster.local>


Or is that REALLY your PTR records..

--
"Catch the Magic of Linux..."

Michael Peddemors, President/CEO LinuxMagic Inc.
Visit us at http://www.linuxmagic.com @linuxmagic
A Wizard IT Company - For More Info http://www.wizard.ca
"LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd.

604-682-0300 Beautiful British Columbia, Canada

This email and any electronic data contained are confidential and intended
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Re: [mailop] Contact Mimecast.com Postmaster - Sending Problems

[Dave Smith via mailop]

Contacted of list.

Dave

From: mailop  on behalf of Nikolas Bauer via mailop 

Date: Thursday, March 16, 2023 at 6:39 AM
To: mailop@mailop.org 
Subject: [mailop] Contact Mimecast.com Postmaster - Sending Problems
Hello List

We have had multiple problems sending emails from our mail.com domains to 
mimecast controlled mailboxes.

Has anyone here had similar problems?

Error message:

SMTP error from remote server for RCPT TO command, host: 
au-smtp-inbound-2.mimecast.com (124.47.150.26) reason: 550 Administrative 
prohibition - envelope blocked - 
https://community.mimecast.com/docs/DOC-1369#550 [Xwi6G9SYM7adxsiZUWh3pw.au54]

We would like to have the reason and a contact to the postmaster. On all common 
email address there is no response.

Anyone got some direct contacts?

Thanks
Nikolas

--
Nikolas Bauer
Senior Mail Security Engineer
Mail Security
1&1 Mail & Media GmbH | Brauerstraße 48 | 76135 Karlsruhe | Deutschland
Phone: +49 721 91374-4714 E-Mail: 
nikolas.ba...@1und1.de | Web: 
http://www.1und1.de/ | http://www.gmx.net | http://www.web.de | 
http://www.mail.com | 
http://www.united-internet-media.de>
Hauptsitz Montabaur, Amtsgericht Montabaur, HRB 7666

Geschäftsführer: Alexander Charles, Ralf Hartings, Thomas Ludwig, Jan Oetjen
Member of United Internet
Diese E-Mail kann vertrauliche und/oder gesetzlich geschützte Informationen 
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[mailop] Contact Mimecast.com Postmaster - Sending Problems

[Nikolas Bauer via mailop]

Hello List

We have had multiple problems sending emails from our mail.com domains to 
mimecast controlled mailboxes.

Has anyone here had similar problems?

Error message:

SMTP error from remote server for RCPT TO command, host: 
au-smtp-inbound-2.mimecast.com (124.47.150.26) reason: 550 Administrative 
prohibition - envelope blocked - 
https://community.mimecast.com/docs/DOC-1369#550 [Xwi6G9SYM7adxsiZUWh3pw.au54]

We would like to have the reason and a contact to the postmaster. On all common 
email address there is no response.

Anyone got some direct contacts?

Thanks
Nikolas

--
Nikolas Bauer
Senior Mail Security Engineer
Mail Security
1&1 Mail & Media GmbH | Brauerstraße 48 | 76135 Karlsruhe | Deutschland
Phone: +49 721 91374-4714 E-Mail: 
nikolas.ba...@1und1.de | Web: 
http://www.1und1.de/ | http://www.gmx.net | http://www.web.de | 
http://www.mail.com | 
http://www.united-internet-media.de>
Hauptsitz Montabaur, Amtsgericht Montabaur, HRB 7666

Geschäftsführer: Alexander Charles, Ralf Hartings, Thomas Ludwig, Jan Oetjen
Member of United Internet
Diese E-Mail kann vertrauliche und/oder gesetzlich geschützte Informationen 
enthalten. Wenn Sie nicht der bestimmungsgemäße Adressat sind oder diese E-Mail 
irrtümlich erhalten haben, unterrichten Sie bitte den Absender und vernichten 
Sie diese E-Mail. Anderen als dem bestimmungsgemäßen Adressaten ist untersagt, 
diese E-Mail zu speichern, weiterzuleiten oder ihren Inhalt auf welche Weise 
auch immer zu verwenden.
This e-mail may contain confidential and/or privileged information. If you are 
not the intended recipient of this e-mail, you are hereby notified that saving, 
distribution or use of the content of this e-mail in any way is prohibited. If 
you have received this e-mail in error, please notify the sender and delete the 
e-mail.

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