Hi, @farmwebdesign!
This error often occurs when you attempt to send an email from a site that isn’t whitelisted on your Brevo account. To fix it, you’ll need to whitelist your site’s IP address on your Brevo account.
1) to find your site IP, please use this tool and enter your domain name;
2) then, go to the Brevo security settings section (link);
3) add your site’s IP(s) to the “Authorize new IP address” section (screenshot).
Once you complete the above steps, wait at least 1 hour for these changes to propagate and try sending a test email (WP Mail SMTP -> Tools) from your site.
In case it helps, you can find these steps in our guide on how to configure the Brevo mailer under the “Frequently Asked Questions” section here.
Kind regards.
I have the same error that still occurs despite following the instructions
Versions:
WordPress: 6.5.5
WordPress MS: No
PHP: 8.0.30
WP Mail SMTP: 4.0.1
Params:
Mailer: sendinblue
Constants: No
API Key: Yes
Debug:
Źródło e-mail: WP Mail SMTP
Mailer: Brevo
unauthorized: not verified
Hi, @tsutsu557!
Thanks for getting in touch, and I’m sorry for the trouble.
Please note, that this error is returned by the Brevo mailing service and they require to perform the above-mentioned steps.
If you still facing the same issue, please, contact the Brevo support team so they can take a closer look.
Kind regards.
