Combine common sender includes, custom include domains, and approved IP senders into one SPF TXT candidate. Use it as a DNS-owner brief, not as proof that every sender has been found.
v=spf1 include:_spf.google.com ~allSPF authorizes servers and services to send for a domain. The generator can assemble common include mechanisms, but your DNS owner still needs to inventory website forms, billing tools, support systems, marketing platforms, and any custom mail servers before publishing.
This is a candidate, not a sender-inventory or compliance guarantee. Run the SPF checker and merge with any existing SPF record before changing DNS.
No. Multiple SPF TXT records can cause validation failure. Merge all legitimate senders into one root TXT record.
SPF evaluation has a DNS lookup limit. Include-heavy records can fail even when the text looks reasonable, so check the lookup count before publishing.
Use hard fail only after every legitimate sender is known and tested. A safer first candidate often uses soft fail while sender inventory is being reviewed.