Build an SPF record
What is it?
A guided builder for the `v=spf1 ...` DNS TXT record, based on which platforms actually send mail on behalf of your domain.
Why it matters
Hand-writing SPF syntax is easy to get subtly wrong — a missing include or the wrong qualifier either blocks your own mail or fails to protect against spoofing.
Impact if ignored
Same stakes as the SPF Checker above — this just helps you get the record right the first time instead of discovering a mistake after mail starts failing.
Common use cases
Which of these send email for this domain?
Other sending IPs (comma-separated, optional)
Policy for everything else
v=spf1 ~all