SPF Record Builder
Construct an SPF record from selected mechanisms and modifiers
3 min read
Tools
SPF Builder
Builds an SPF TXT record by selecting mechanisms and qualifiers. A lookup counter tracks your usage against the 10-lookup limit.
Mechanism Types
ip4 / ip6 | Authorize specific IP addresses or ranges |
include | Reference another domain's SPF record |
a / mx | Authorize a domain's A or MX records |
redirect | Defer to another domain's SPF entirely |
exists | Macro-based mechanism for advanced use |
Qualifiers
+ Pass | Authorize the source (default) |
~ Softfail | Accept but mark as suspicious |
- Fail | Reject unauthorized sources |
? Neutral | No policy stated |
Tip: Keep your SPF record under 10 lookups. Use include: for email services and ip4: for dedicated servers.