About the SPF Record Checker
The SPF Checker fetches a domain's v=spf1 TXT record and explains it mechanism by mechanism — who may send mail, how many of the maximum 10 DNS lookups are used, and whether the all-qualifier actually protects you. Pair it with the DMARC Checker: SPF alone doesn't stop From-header spoofing.
-all (fail) tells receivers to reject non-listed senders; ~all (softfail) marks them suspicious but usually still delivers. ?all is neutral and offers no protection.
Every include:, a:, mx:, exists: and redirect= costs a DNS lookup; past 10, receivers return permerror and your SPF effectively fails. Consolidate includes if you get close.
No — multiple v=spf1 TXT records are a permanent error. Merge all mechanisms into one record.