Soft Bounces - 550 5.4.1 - how can I stop this?

[DHyett]

A portion of all our email campaigns soft bounce with the following error:

Rejected by recipient's email security filter

FILTERED 550 5.4.1 Recipient address rejected: Access denied. 

How can I stop this? Is there a setting that is preventing deliverability from our Hubspot end - I am new to Hubspot so not sure if something isn't right on the setup front.

[SydMarsh20]

Hi I am experiencing the same issue and have all authentication setup in hubspot. Is there any reason why their email domains are still flagging our sends?

[DHyett]

Hi, Yes email sending domains are authenticated

[karstenkoehler · Accepted solution]

Hi @DHyett,

Have you fully authenticated your sending domain? https://knowledge.hubspot.com/marketing-email/manage-email-authentication-in-hubspot

Best regards

[DHyett]

Hi, Yes email sending domains are authenticated