Soft Bounce from transational emails from BREVO (Sendinblue)

Soft Bounce from transational emails from BREVO (Sendinblue)

I manage the website of a client who uses your EMAIL service for the domain floranativadobrasil.com.
 And I use the BREVO email service, previously called SendinBlue, to send transactional emails about events specific to the website.

All emails sent to any email account managed by Zoho for this customer domain receive a SOFT BOUNCE.
The sender of these emails is the fictitious address site@floranativadobrasil.com.br.  Could this be the reason why Soft Bounce occurs in all recipients with emails from the organization?

O erro reportando nos LOGS da brevo é esse:

Soft bounce 15-09-2023 15:07:34
554 5.2.3 MailPolicy violation Error delivering to mailboxes
    • Sticky Posts

    • Pocket from Mozilla is closing shop. Don’t lose your favorites . Move them to Zoho Mail Bookmarks now! 📥🔖

      The end of Pocket shouldn't mean the end of your important links and content. Easily import them into Zoho Mail's Bookmarks and continue right where you left off. You can bring over your entire Saves, Collections, and tags just the way they are. Bookmarks
    • Zoho Mail POP & IMAP Server Details

      Hello all! We have been receiving a number of requests regarding the errors while configuring or using Zoho Mail account in POP/ IMAP clients. The server details vary based on your account type and the Datacenter in which your account is setup. Ensure
    • Workplace - Zoholics Europe Customer Awards

      Dear Zoho Mail Community! 📣 We're excited to announce that at this year's Zoholics events across Europe, we're holding customer awards for the first time ever! Workplace - Zoholics Europe Customer Awards This is your chance to shout about the amazing
    • Important update on Group Management | Zoho Mail

      Dear Zoho Mail Community, This post is to inform you all of the following updates on the Group Management in Zoho Mail. Group Member Addition: If a group member is added to an organization group in a Zoho Application, the member will be automatically
    • Mastering email etiquette and best practices to follow in Zoho Mail

      Hello Zoho Mail Community, We’re thrilled to invite you all to our upcoming webinar: Mastering email etiquette and best practices to follow in Zoho Mail. Join our live webinar for expert etiquette tips to enhance your professionalism and elevate your