It is important to correctly configure the TXT record on the DNS for the SPF.
The SPF (Sender Policy Framework) record, within a domain, allows you to indicate which servers are used to send emails for that domain.
In this way the recipient can verify that the email does not come from spammers or hackers, if it was sent from a server not indicated in the SPF.
Utixo uses an include, if you already have an SPF record you must add the following to the current string:
On the other hand, if you don't have the SPF record, the complete string is the following:
"v=spf1 +a +mx include:spf.utixo.net ~all"
This authorizes all Utixo servers to send on behalf of your domain, once the record is configured it is important to check it through the numerous tools available on the web, consider about 1 hour for DNS replication.
If you have a domain / DNS with Utixo, the configuration will be automatic and does not require your intervention.
Here you can see the result.