Deliverability
SPF
SPF, or Sender Policy Framework, is an email authentication record that lists which servers are allowed to send mail for your domain.
Why it matters
SPF is one of the checks mailbox providers run to decide if a message is really from your domain. Without it, your mail is more likely to be treated as suspicious or spoofed, which hurts deliverability. It is a basic requirement for any team sending outbound at volume, and missing it caps how far the rest of your setup can carry you.
How it works in practice
SPF is a DNS record that names the servers and services authorized to send on behalf of your domain. When a receiving server gets a message, it checks whether the sending server appears in that list. A pass supports delivery; a fail is a signal the mail may be forged. SPF works alongside DKIM and DMARC, not on its own.
Common mistakes
A common mistake is listing too many senders or leaving old services in the record, which weakens the check or exceeds lookup limits. Another is assuming SPF alone is enough, when providers increasingly expect DKIM and DMARC too. A third is forgetting to update SPF when you add a new sending tool.
How hubsell approaches it
hubsell sends through authenticated infrastructure and guides you to set SPF, DKIM, and DMARC correctly, so your outreach passes the checks that protect the inbox.