It is not recommended to use multiple SPF records for the same domain as it can cause conflicts and lead to SPF failures.
However, if you have multiple services that send email on behalf of your domain, you can combine the SPF records into a single record using the “include” mechanism.
For example, if you have a main domain example.com and also use an email marketing service, you can create an SPF record like this:
v=spf1 include:spf.mailchimp.com include:\_spf.example.com ~all
This record includes both the SPF record for Mailchimp and a custom SPF record for your domain (which may include other services that send email).
Note that the “all” mechanism should always be the last one in the record, and you should test your SPF record thoroughly to ensure it is working as intended. It’s also a good idea to regularly monitor your SPF results and adjust your record as needed to ensure optimal deliverability of your emails.
