Some outbound emails are being bounced

Symantec/Broadcom have now resolved the issue.

Please note this issue would have only affected you if your organisation uses Symantec Email filtering for inbound and outbound emails.

From: https://email-security.status.broadcom.com/incidents/0tyq2mr1gn3g

On June 17, 2021 between 05:30 UTC and 08:30 UTC, we experienced issues delivering emails to recipients who use Spamhaus DNS blocklists. Our investigation shows the issue occurred due to a configuration issue with Spamhaus resulting in listing of our IPs. Please note that there was no impact to protection services, and all other aspects of our services remained functional. As of 08:30 UTC, all listings have cleared and we are no longer experiencing delivery issues and email service is fully operational.

Broadcom/Symantec have removed incorrectly classified IP addresses by Spamhaus. They're working on automating this with Spamhaus, as Symantec servers are trusted senders.

If you received an email bounce earlier today, please try re-sending your email again now.

If you continue to receive bounces, please forward the error to our support address so we can report the affected IP address.

This issue has affected customers globally. We apologise for the inconvenience.

We are aware that when sending emails, some of these are being bounced with a message "Reason: 550 5.7.1 Mail from IP X.X.X.X was rejected due to listing in Spamhaus SBL".

We have opened a case with Broadcom/Symantec as this is affecting multiple customers.

Inbound email is not affected.

We will provide an update shortly.