OVH Email Pro – TLS does not work with PrestaShop 9 (MX Plan works)

[Teff34]

Hello,

I am new to the forum, thank you in advance for your help 🙂

I am using PrestaShop 9 on OVH hosting (PHP 8.1).

I am trying to configure SMTP with an OVH Email Pro mailbox.

Here are my tests:

With an OVH MX Plan account:

TLS + port 465 → works

With an OVH Email Pro account:

No encryption + port 587 → works

TLS + port 465 → does NOT work

TLS + port 587 → does NOT work

Error message:

Connection could not be established with host "ssl://pro3.mail.ovh.net:465": stream_socket_client(): Unable to connect to ssl://pro3.mail.ovh.net:465 (Connection timed out)

TLS works correctly with MX Plan on the same server.

Has anyone experienced this issue with OVH Email Pro?
Should a different SMTP server be used?

Thank you very much.