引き続きメールが拒否されており改善が見られない場合は、HENNGE One サポート窓口までご連絡くださいますと幸いです。 本件、ご迷惑をおかけしました事を深くお詫び申し上げます。
------------------------ Here is a follow-up on this matter.
We have confirmed that the issue of emails sent from HENNGE Email DLP being rejected by recipients due to incorrect RBL listings has been resolved. We have not observed any new rejections at this time.
Please note that emails that were rejected during the incident will not be resent automatically. We kindly ask you to resend them manually. Also, if you temporarily disconnected HENNGE Email DLP, please reconnect it.
If you are still experiencing email rejections and see no improvement, please contact the HENNGE One support team.
We sincerely apologize for any inconvenience this may have caused.
■パターン1 said: 550 5.7.1 Service unavailable; client [IPアドレス] blocked using Cloudmark Sender Intelligence (Visit https://csi.cloudmark.com/reset-request/ if you feel this is in error.)
■パターン2 said: 550 5.7.1 Service unavailable; Client host [IPアドレス] blocked using gmo-rbl.jp; Poor Reputation Sender
緊急度合いが大きい場合には Microsoft 365 / Google Workspace から HENNGE Email DLP を 一時的に切り離すことも、ご必要に応じてご検討いただけますと幸いです。 ※切り離しを実施している間のメールは HENNGE Email DLP によるフィルター処理や添付ファイルの ZIP 暗号化、URL 化は行われませんのでご注意ください
------------------------ We have confirmed that emails sent via HENNGE Email DLP are being rejected by recipients due to their registration on RBLs (Real-time Blackhole Lists).
Our systems team is currently investigating this issue and is in the process of submitting removal requests to the relevant RBLs.
When an email is rejected due to this issue, you may receive a delivery failure notification containing an error message like one of the following:
■Pattern 1 said: 550 5.7.1 Service unavailable; client [IP address] blocked using Cloudmark Sender Intelligence (Visit https://csi.cloudmark.com/reset-request/ if you feel this is in error.)
■Pattern 2 said: 550 5.7.1 Service unavailable; Client host [IP address] blocked using gmo-rbl.jp; Poor Reputation Sender
If the issue is urgent, you may want to consider temporarily disconnecting HENNGE Email DLP from Microsoft 365 / Google Workspace. Please note that during this period, emails will not be filtered, and attachments will not be ZIP-encrypted or URL-converted by HENNGE Email DLP.