SPF record to prevent spam delivery

How to prevent email from being sent to spam. Let say email originating from a specific IP, for example, a website contact form, is delivered to spam. One step is to add an SPF record to the domain DNS.
In your domain registrar or host managing the nameservers, add a TXT record with the value:

v=spf1 mx a ip4: include:_spf.mailserver.com ~all

Change the ‘’ to the IP address which is delivering to spam.
Change the ‘mailserver.com’ to actual mailserver for the domain.

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