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SPF record builder

Build an SPF TXT record and check qualifiers, mechanisms, and the 10-lookup limit.

include: domains, one per line ip4 addresses or CIDRs, one per line ip6 addresses or CIDRs, one per line

Mechanisms

a mx

Trailing policy redirect= domain (optional)

Built record

Or paste a record to check instead

Term	Effect
`+` `-` `~` `?`	Pass, fail, softfail, neutral. A missing qualifier means pass.
`include` `a` `mx` `exists` `redirect`	Each one counts toward the 10 DNS lookups in this record.
`ip4` `ip6` `all`	No DNS lookup. `all` should be the last mechanism.