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Custom domain is suddenly no longer known
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Hello,
Mailbox seems to have forgotten my custom domain. If I send myself an email I only get the error message
The message could not be sent. Error message from the mail transport server: <foo@bar.example>: Recipient address rejected: Domain not found.
What can I do?
(There have been some DNS issues with my custom domain, which have been resolved recently.)
Ich habe das gleiche Problem 
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Echtzeitbenachrichtigungen funktionieren möglicherweise nicht
Hi Tom,
thank you very much for your message. I will look into the matter.
With kind regards
---
Felix Kaspar
Teamlead
mailbox Support
Ein paar nützliche Links:
Hi Tom,
thank you very much for your message. I will look into the matter.
With kind regards
---
Felix Kaspar
Teamlead
mailbox Support
Ein paar nützliche Links:
Dear Tom,
Unfortunately, there is currently an issue with our email system. Our administrators and consultants are working to resolve the problem. I will let you know as soon as I have more information. In the meantime, I ask for your patience. We apologize for the inconvenience. If you have any further questions, please feel free to contact me.
Sincerely
---
Felix Kaspar
Teamlead
mailbox Support
Ein paar nützliche Links:
Dear Tom,
Unfortunately, there is currently an issue with our email system. Our administrators and consultants are working to resolve the problem. I will let you know as soon as I have more information. In the meantime, I ask for your patience. We apologize for the inconvenience. If you have any further questions, please feel free to contact me.
Sincerely
---
Felix Kaspar
Teamlead
mailbox Support
Ein paar nützliche Links:
Dear users,
Over the past hours, some users experienced delays in the delivery of incoming emails. We would like to briefly explain what happened and provide an update on the current status.
First and most importantly:
No emails were lost. All affected messages remained in the queues of our mail servers and are currently being delivered gradually as the systems process the accumulated backlog.
Cause
The delays were caused by issues with an external service that is widely used by mail servers around the world for spam detection.
Specifically, the DNS-based blocklist SURBL (Spam URI Realtime Blocklists) returned erroneous DNS responses in the form of SERVFAIL. As a result, DNS lookups performed by our spam filtering systems repeatedly failed or had to be retried, which temporarily slowed down the processing of incoming emails.
Measures
Once the cause was identified, we temporarily disabled SURBL lookups in our spam filtering configuration. Since then, email processing has returned to normal and the messages that accumulated during the incident are being delivered continuously.
In addition, we are reviewing further measures to make our systems even more resilient to disruptions in external services.
Current Status
Our systems are currently processing the remaining queues. All delayed messages are continuing to be delivered.
We apologize for the delays and thank you for your patience and understanding.
Best regards
---
Felix Kaspar
Teamlead
mailbox Support
Ein paar nützliche Links:
Dear users,
Over the past hours, some users experienced delays in the delivery of incoming emails. We would like to briefly explain what happened and provide an update on the current status.
First and most importantly:
No emails were lost. All affected messages remained in the queues of our mail servers and are currently being delivered gradually as the systems process the accumulated backlog.
Cause
The delays were caused by issues with an external service that is widely used by mail servers around the world for spam detection.
Specifically, the DNS-based blocklist SURBL (Spam URI Realtime Blocklists) returned erroneous DNS responses in the form of SERVFAIL. As a result, DNS lookups performed by our spam filtering systems repeatedly failed or had to be retried, which temporarily slowed down the processing of incoming emails.
Measures
Once the cause was identified, we temporarily disabled SURBL lookups in our spam filtering configuration. Since then, email processing has returned to normal and the messages that accumulated during the incident are being delivered continuously.
In addition, we are reviewing further measures to make our systems even more resilient to disruptions in external services.
Current Status
Our systems are currently processing the remaining queues. All delayed messages are continuing to be delivered.
We apologize for the delays and thank you for your patience and understanding.
Best regards
---
Felix Kaspar
Teamlead
mailbox Support
Ein paar nützliche Links:
Der Fragesteller scheint aber ein anderes Problem zu haben bzw. gehabt zu haben, oder? Dieses "Domain not found" kommt ja nicht zum ersten Mal bei euch vor. Stichwort DNS-Cache.
Der Fragesteller scheint aber ein anderes Problem zu haben bzw. gehabt zu haben, oder? Dieses "Domain not found" kommt ja nicht zum ersten Mal bei euch vor. Stichwort DNS-Cache.
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