Domain delivrability problem

[antoine-dudu]

Hello,

We have had deliverability issues for several months with our domain to customers using Cisco.

We have the error "550 5.0.350 Remote server returned an error -> 554 Your access to this mail system has been rejected due to poor reputation of a domain used in message transfer "

We did marketing campaigns in the middle of last year (through September) that weren't good, and we definitely got stuck somewhere.

Can you confirm this for us? And above all, how can we fix this?

I would point out that we are not Cisco customers, but we have several customers who use it and with whom we can no longer exchange by email.

This is a big problem for us because we can no longer contact our customers/prospects using Cisco, we obviously stopped the marketing emails that were done last year.

Thanks a lot for your help,
Antoine

[ramonmexhost]

I have this problem too.

Someone could provide the way to open a ticket o request a reputation reclassification or something else?

Thanks.

[shane.dollery]

If you are a Cisco customer then log a TAC case. If you are not a Cisco customer then the best way would be to contact your customers, who are not receiving your emails by another means (telephone) and as they are customers get them to log a TAC case with Cisco.
Before you do I'd check to make sure you have the following in place:

* SPF
* DKIM
* DMARC p-reject or p=quarantine
If you're using an EDM/CRM that's being rejected, try using a dedicated IP so the email reputation of your MTA's is not dependant on other customers of that system. You can check the reputation of your domain/IP's at https://talosintelligence.com/
Cheers,

Shane

[Pierre ID]

Hi Shane,

Our DNS records are OK, 

We checked our reputation on talos Intelligence, it shows as neutral.

There is nowhere we can find a reason for our domain to be blacklisted by Cisco. Only recipients using Cisco Ironport report that poor reputation. Even trying to joinn a Cisco email address we receive a non deliverability notification due to that poor reputation reason.

We cannot use a dedicated IP as we're using 365 but all the IP used in mails not being delivered have been checked and none of those were blacklisted.

Is there a way to know the reason behind this classification?

[antoine-dudu]

Hi Shane,

We already did that. (we are not customer)

But everythime it's resolved by automation, because our domaine has a "Neutral" Reputation on TalosIntelligence.

We have problem with people using IronPort Cloud, but we don't know where we can find someone to explain what is that actual problem...

[antoine-dudu]

Up ! How can we contact Cisco if we are not a Cisco customer ?

We still have the problem, only with IronPort Cloud users.

[Octavian Szolga]

Hi Antoine,

In case of Pieere, the issue was not with Sender Base Reputation Score (SBRS - numerical value from -10 to +10), but with Sender Domain Reputation (label like reputation - domain Tainted, Weak, Poor, etc).

You should check which component affects your domain reputation (SBRS or SDR).

BR,

Octavian

[masterwa111]

This has to be the most frustrating issue. I too am experiencing this with a new domain on Microsoft 365

The issue is with SDR - my domain is brand new and I cannot email anyone running ironport

Dont bother trying what I did, you will not get anywhere. Hope I can save everyone else time

- open a ticket with Talos web portal - automated closure saying domain is fine

- call cisco tac - denied because we are not a cisco customer

- call cisco  tac and complain even further - forwarded to Talos team who says open a ticket with the Talos portal. ALREADY DID THAT!

- Final answer is we cannot email these domains until our reputation improves. Nothing you can do about this except wait for who knows how many months

Yes we have SPF, DMARC DKIM setup through Microsoft 365 - There is nothing wrong with our domain

The only workaround for us is to ask the person you are emailing to whitelist the domain in their SDR settings (Total waste of time, people that run ironport are large companies/government agencies so good luck getting to the Ironport admin)

OR - like we did, email them from a gmail address. Totally unprofessional but these are your only 2  options

Hope I saved you some time and i'll never purchase one of these POS devices