Blocage mails vers gmail

Bonjour,
Comme beaucoup de personne je rencontre ce problème d'envoi de messages sur de nombreuses boites gmail. J'ai mis un SPF samedi mais pas de changement, j'ai encore fait un essai hier soir et voici le message :
This is the mail system at host mo528.mail-out.ovh.net.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

: host gmail-smtp-in.l.google.com[173.194.76.27] said:
550-5.7.26 This mail is unauthenticated, which poses a security risk to the
550-5.7.26 sender and Gmail users, and has been blocked. The sender must
550-5.7.26 authenticate with at least one of SPF or DKIM. For this message,
550-5.7.26 DKIM checks did not pass and SPF check for [amv14.fr] did not
pass 550-5.7.26 with ip: [46.105.34.251]. The sender should visit
550-5.7.26 https://support.google.com/mail/answer/81126#authentication for
550 5.7.26 instructions on setting up authentication.
o10-20020a5d408a000000b0030fc243faa5si1171986wrp.1053 - gsmtp (in reply to
end of DATA command).

Avez-vous un autre conseil ? merci à la communauté

Bonjour,

Vous avez modifié le SPF où ?
Car vos DNS sont chez WIX.

Et là actuellement le SPF semble correct.

Cordialement, janus57