SPF (Sender Policy Framework) is an email authentication standard that lets you tell mailbox providers exactly which servers are allowed to send email on behalf of your domain. When a receiving server sees a message claiming to come from you, it checks your SPF record in DNS and verifies the sending IP. If the IP is not on the allowed list, the message can be rejected, quarantined or flagged as spam.
How SPF works in practice. You publish a single TXT record on your domain — for example, v=spf1 include:_spf.mailpro.com ~all — listing every server allowed to send for you. Recipient servers read that record at delivery time, compare it to the IP that just connected, and apply a pass/fail/softfail policy depending on the qualifier you set. SPF validates the envelope sender, not the body of the message, so it works hand in hand with DKIM and DMARC for full coverage.
Why SPF matters for senders. Without a valid SPF record, mailbox providers cannot reliably tell a legitimate campaign from a spoofed one — your open rates drop and your domain reputation erodes. Done right, SPF is a low-effort, high-impact step that protects your brand from spoofing and keeps your good mail in the inbox.
Mailpro and SPF
SPF, configured for you out of the box
Every Mailpro account ships with SPF, DKIM and DMARC pre-configured. You do not have to touch a DNS record — your emails are authenticated from day one.