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Authenticating incoming email (SPF, DKIM, DMARC)



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Lisa Kelly

Zendesk Documentation Team

Edited Jun 21, 2024


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9 comments

Is it possible to whitelist certain domains?

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Zsa Trias

Zendesk Customer Care

Hello HenaMathew,

Yes, you can add domains to your allowlist and blocklist on the Admin Center. 
Just navigate to Configuration > End users where you will find these settings. 

Reference: Using the allowlist and blocklist to control access to Zendesk Support

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Hi there, rather than block a list of FROM: addresses, we need to block from specific incoming domains for example:

DKIM: 'PASS' with domain bademail.com

Is this possible?

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Christine

Zendesk Engineering

Hi Phil,
 
To blocklist specific domains, here's a sample of what you can put in the Blocklist field with that sample domain above:
allowlist: 
blocklist: reject:bademail.com
 
In this sample, everyone can access your Zendesk account except users sending email from bademail.com domain.
 
See Allowlist and blocklist usage examples.

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Hello, we are having a spam problem. Even with SPF-, DKIM- en DMARC checks enabled. Would it be possible to block foreign users from mailing us? We only have Dutch customers. Thank you.

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Dainne Kiara Lucena-Laxamana

Zendesk Customer Care

Hi Ramses SKP 

Unfortunately it's not natively possible to block countries from sending Email to your Zendesk Support Address. If you have your own (external) support address, your Email provider may have a function to block countries. That would prevent tickets from getting forwarded to your Zendesk support address & creating tickets. 

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Even after having Authenticating incoming email (SPF, DKIM, DMARC) enabled we still receive several spam tickets per day. 

 

This is something new and it started about a month ago.

 

How can we stop this? Is it possible to add a recaptcha to our forms?

Can you help by impoving or enforcing a honeypot? 

 

Please see attachment. Thank you.

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Paolo

Zendesk Engineering

Hi Ramses,
 
If the Authenticating incoming email (SPF, DKIM, DMARC) has been enabled and you are still receiving spam tickets, it's likely that these spam tickets are coming from a different channel. For us to better assist you here, we need specific samples. I highly recommend reaching out to our Support Team and provide as much information as possible. More information here: Contacting Zendesk Customer Support
 
Best,

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We are also receiving this kind of spam as Ramses mentioned. We hope Zendesk could find solution. I have tried so many time with support, but I'm getting frustrated. 

 


And not only that kind, but one e-mail is also getting spam like below:

 


I would hope that Zendesk would reach out to their 3rd party provider for the spam filtering, and improve on this. 

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