Hello!
I own the domain coursantibes.fr at Gandi.
Thanks to my OVH Business “Startup” hosting, my website works well:
I would like to create a new email address at OVH, with the address [my first name]@coursantibes.fr.
But on my OVH hosting, apparently there is no domain attached: this prevents me from creating an email account.
To set up this new mailbox, I created yesterday at Gandi these DNS records:
5 MX DNS records
1 TXT DNS record
But I am stuck for now.
How can I proceed? Thanks 
Hello @Fabrice1
To activate the mail offer included with your hosting plan, your domain name needs to use an OVHcloud DNS zone. To create a DNS zone: https://manager.eu.ovhcloud.com/#/web/zone/new (free)
Then I will ask you to set up all the DNS records currently in place in this new OVHcloud DNS zone. Once the configuration is finished, simply update the DNS servers of your domain name at Gandi: https://docs.gandi.net/fr/noms_domaine/operations_courantes/changer_serveur_de_nom.html
You will then need to wait between 24 and 48 h for the change to propagate; no service will be interrupted since the DNS zone will be the same, and then you will be able to activate the mail offer.
Astérix
Hello!
@Asterix, many thanks for this precise answer
I have indeed created this OVH DNS zone (only for coursantibes.fr). Initially, there are 11 DNS records.
If I understand correctly, I need to:
Hello,
I’ve made the changes to set the same DNS at OVH as I have at Gandi.
The MX Plan option (email) is now available to me.
I’ll wait 24–48 hours for the DNS to propagate.
Sorry for the response time..
It's perfect! Feel free to get back to us to let us know if everything is ok or if you still need help
Astérix
Hello,
No problem, @Asterix
I have enabled the email offer of my hosting package; we have to wait for it to be set up.
On Gandi I use the " Gandi LiveDNS "; apparently, these update automatically. So I imagine there will be nothing more to do.
I will get back to you, at least when my new email address is created
Hello,
Update:
My new mailbox has been set up correctly.
It’s been 48 hours since I modified the DNS records.
I kept the Gandi LiveDNS unchanged and did nothing else.
My new mailbox receives emails perfectly.
But when I send an email, everything looks normal, yet it never reaches the recipient.
How can I fix this?
Thanks
The SPF record used by your domain name is not correct: "v=spf1 include:://ovh.com ~all"
Furthermore, the SPF record is required for the proper functioning of your mailings, so I invite you to remove it from your Gandi DNS zone and replace it with this record:
• Type TXT
• Sous-domaine : (laisser vide)
• TTL : Par défaut
• Cible : "v=spf1 include:mx.ovh.com ~all"
Hello,
Thanks @Asterix for this quick response!
I just made the change.
I'll wait at least 24 hours before testing.
Feel free to keep us posted
Have a great weekend!
Hello,
Update: my new mailbox works perfectly, both for receiving and sending messages
Emails that I thought were lost for 2 days reappeared within the hours after the latest DNS change.
Thanks @Asterix!
Thanks for the feedback, it's a pleasure
Feel free to mark the topic as resolved!
Hello,
ok, @Asterix,
But I think I’ll soon replace my site with a new one on WordPress (same URL); there may be some changes to make to the DNS?
If your plan allows you to link another domain name to your hosting, you can, from the multisite of your hosting, create a sub‑domain such as: preprod.coursantibes.fr.
Thus, you can easily create a WordPress site for this sub‑domain; once it is set up and the WordPress site is functional, you can change the site’s URL to link it to the primary domain.
Since the subject is different and this topic is resolved, feel free to open a new one if needed. 
Astérix
Hello,
Ok, thank you @Asterix ;
The solution of a sub‑domain (for my new WordPress site) is interesting,
I’ll dig into it
Thanks @Gaston
I saved this link.
Since the initial subject has been resolved, I don’t think I’ll add to this thread.