Jak vyřešit Undelivered Mail Returned to Sender?

Ahoj/Dobrý den,

potřeboval bych vyřešit problém týkající se příchozích emailů z http://wes1-so1-redir.wedos.net/. Přijetí emailu skočí do spamu protože není oveřena emailováí adresa pomocí SPF nebo DKIM? Mohu to opravit já sám nebo potřebuji lidi z Wedosu?

Jde o chybu:

“

This is the mail system at host wes1-so1-redir.wedos.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[142.250.27.27] said:
550-5.7.26 This message does not have authentication information or fails
to 550-5.7.26 pass authentication checks (SPF or DKIM). To best protect our
users 550-5.7.26 from spam, the message has been blocked. Please visit
550-5.7.26  https://support.google.com/mail/answer/81126#authentication for
more 550 5.7.26 information.
hz4-20020a1709072ce400b0071605875ceasi10746743ejc.645 – gsmtp (in reply to
end of DATA command)
“

Díky