SPF is technically a TXT record. Receiving mail servers check whether the sending server is authorised by this policy.
Which value should you enter?
| Record type | SPF |
| Value | TXT value, for example v=spf1 include:example.com -all |
| TTL | Use the default value unless a provider specifies otherwise. |
What should you consider?
- Publish no more than one SPF record per host name.
- Combine all legitimate sending services in the same policy.
- Use -all only when you are sure all sending sources have been included.
DNS changes take time
After saving, an old value may temporarily remain in cache. Therefore, check not only in your browser but also with an external DNS checker.
Frequently asked questions
When will an SPF change become visible?
This depends on the TTL and provider caches. The change is often visible within a few minutes, but old responses may be retained for longer.
Can I undo a DNS change?
Yes. Restore the previous value and save again. This correction may also temporarily be affected by DNS cache.
Do I need to change the TTL?
Usually not. For a planned migration, you can lower the TTL in advance so later changes are retrieved more quickly.
Still need help?
Email support@mosthosted.com and include your domain name, the required record and the value.