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Hello,

Thank you for contacting Odoo support. I would be happy to assist you in this matter.

From what I am able to see the reason your mailings are failing are due to a session limit imposed by your email provider. I would recommend reaching out to said provider to have this limit increased and or altered to allow your mailings to be properly released.

Also, taking a look at the domain "corazondecacao.com", the DNS settings of said domain are not configured properly. The DNS records refers to the SPF/DKIM/DMARC all of which are either misconfigured or don't exist.

We have documentation that can assist you that I have placed below, in regards to the DNS settings. Feel free to take a look and make the updates at your leisure.

https://www.odoo.com/documentation/17.0/applications/general/email_communication/email_domain.html

If you have any other questions, don't hesitate to ask.

Best Regards,
Matthew

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Matthew Foster (mfos)

+32 81 81 37 00 | info@odoo.com | https://www.odoo.com