SPF (Sender Policy Framework) is mechanism that allows you to define servers which have permission to send emails from your domain. Thanks to the setting, Professional email server can be publicly authorized to send emails by your name.
You need to set DNS record (in TXT form) that gives you positive ranking for antispam filters. This will increase the delivery level of your emails vie external systems. Some email servers are looking for SPF records on your emails.
The example of DNS record in TXT form is:
v=spf1 include:spf.emailkampane.cz ~all
If you need to insert more values to SPF record, never create new one - it will be penalized by almost all receivers. Always add parameters to the existing SPF record, like:
v=spf1 include:spf.protection.outlook.com include:spf.emailkampane.cz -all
The "-all" parameter is strict value for enforcing the rules of the SPF record. It is higher level of authorization. But if the email is incorrect, it will be strictly rejected.
The "~all" parameter has only informative function. It is lower level of authorization. Incorrect email will receive some negative points by antispam filters, but it is not strictly rejected.
DNS Record Setting
If you are administrator of your domain, please follow these steps, or contact your webmaster:
- Login to the administration where you can manage your domain.
- Find out DNS records setting for your domain.
- Add new DNS record in TXT form that contains: v=spf1 include:spf.emailkampane.cz ~all
- Save your changes.
If you want to verify your SPF record, you can check it here.