Server Blocked on UCEPROTECT-Level 3 How to enable Email sending over IPv6

Hi everyone,
I have my VPS hosted on OVH Cloud servers. Sudenly all the OVH IPs have been added to the UCEPROTECT-Level 3 List.
I have reported this to OVH and their answer is that UCEPROTECT is asking to pay to remove their IPs from the list.
To solve the problem, their only sugestion is to wait 7 days or to send my emails using IPv6 instead of IPv4 because UCEPROTECT does not manage IPv6 sended emails.
Can anyone help me making this changes? I’m not familiarized with IPv6.
Thank you verry much and excuse-me for my bad english.

HestiaCP does not currently support IPv6. You are better off to avoid using a webserver as a direct email relay. Invest in a properly managed smarthost service to avoid collateral damage caused by IP reputation issues.

Thanks for your suggestion.
I’m using brevo as an email relay, but all emails continue to be marked as SPAM.
OVH’s suggestion is to send emails via IPv6 to overcome the situation.
Since 2020, HestiaCp users have been asking for support for IPv6. I understand that it takes time to develop but I have to start thinking about an alternative because the market changes quickly and HestiaCP is not adapting to these changes.

Email deliverability is too complex of a subject to get into an in depth discussion here, but I can assure you that simply moving to IPv6 is not going to be a panacea. You will be far better off taking a deep dive into learning who is blocking your messages and understanding why. I’ll give you a hint, it is never the blocklist publisher that is causing the emails to be flagged as spam.

Have you tried sending email to Mail-tester?

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