Publish one SPF record
If several providers send for a domain, combine their approved mechanisms into one v=spf1 TXT record. Two separate SPF records are not a safe way to add a provider.
Sending permissions
Free SPF record checker.
Your website, newsletter service and team may all send mail using one domain. SPF is the public list of sources your domain allows. Look up that list, spot common mistakes and compare it with the services you really use.
Find your domain’s sending list and spot common mistakes.
- Free to use
- No sign-up
Your domain deserves a proper inbox.
TrekMail is email hosting for your own domain, with guided setup and a free plan to get started.
See how TrekMail worksLook up an SPF record
Don’t have a domain handy?
Made by TrekMail email hosting. Start with free Nano, or try an eligible paid email plan for 14 days. Explore email hosting
Your domain report
Results
This is a public DNS snapshot. It does not test real message authentication, mailbox availability or inbox placement.
Email hosting by TrekMail
Your email address.
Your domain.
A proper setup.
Give your business an inbox that belongs to you. Create mailboxes on your own domain and manage them together in TrekMail.
We generate the DNS records your domain needs for receiving and sending, including SPF, DKIM and DMARC. Follow the setup guide, or publish through a supported Cloudflare connection, then check the result in your dashboard.
Free Nano plan available. No card needed to start.
Your next email addresshello@yourbusiness.com
Bring your domainKeep your business identity.
Follow the setupGet the records and check them.
A new newsletter service is sending mail. Is it listed?
You connected a newsletter service, but it may need permission to send for your domain. Look up your current SPF policy before adding or removing a sending service.
What should I look for?
The record lists an older provider but no entry for the one you just connected.
Follow the new provider’s SPF instructions and combine approved sources into one record. Check every service that still sends before removing an existing entry.
This check highlights duplicate policies and rules that are obviously too open. It counts only the direct DNS terms in a record, so it cannot certify the complete SPF lookup limit or say whether one message passed.
Make your sending policy easier to understand.
Adding a sending service? Start by finding out what your domain already allows.
Read the final policy
-all requests a fail for unlisted sources; ~all requests a softfail. +all permits every source. Choose a policy only after identifying all legitimate senders.
Know the lookup limit
SPF evaluation allows at most 10 DNS lookup terms, including nested policies. We count direct terms only. Includes, redirects, macros and void lookups require a complete evaluator.
A little knowledge. A better setup.
How to check an SPF record and read the result
Find your current sending policy before adding a newsletter service, changing email hosts or troubleshooting a missing SPF record.
Check SPFLook up the sending domain
Enter the domain used for your sending service’s return-path, also called the envelope sender. It may differ from the address people see in From. The SPF checker retrieves its public TXT record and highlights common problems, including multiple SPF policies and a policy that permits every sender.
v=spf1 ip4:192.0.2.10 -all
Example only. 192.0.2.10 is a documentation address, not a mail server you should authorize.
Understand a simple SPF record
SPF stands for Sender Policy Framework. A record begins with v=spf1 and lists mechanisms such as ip4, ip6 or include. In the example below, the reserved documentation IP address is allowed; -all requests an SPF fail for other sources. Your provider will supply the values appropriate for its servers.
An include points to another SPF policy. That policy may contain further includes, which is why a short-looking record can still involve many DNS lookups. This tool counts direct lookup terms; it does not expand the entire chain or evaluate a particular sending IP.
Fix duplicates without dropping a real sender
Publish one SPF TXT record for each sending domain. When two services give you different records, combine the mechanisms according to their instructions rather than publishing both as separate SPF records. List every service that still sends before deleting an older entry.
After publishing the change, run the SPF lookup again. To understand a real message’s outcome, inspect its Authentication-Results header and check DMARC alignment as well. A valid SPF record alone is not an inbox delivery guarantee.
Understand the result. Take the next step.
Practical guides from TrekMail, with setup instructions and deeper explanations for this tool.
Start free. Give your email room to grow.
Choose a free inbox to get started, or a paid plan for sending through TrekMail. One plan covers your account, with no per-seat fees.
Free for now
Nano
$0/month
Your own domain, your first mailboxes, no credit card.
- 10 domains
- 10 mailboxes per domain
- 5 GB shared storage
- Receive email and use webmail
Sending through TrekMail is included in paid plans. Nano can use your own SMTP service.
Send and receive with TrekMail.
Try an eligible paid email plan for 14 days.
Starter
For a small business
$4/month
- 50 domains
- 100 mailboxes per domain
- 15 GB shared storage
- Sending included
Pro
For a growing team
$10/month
- 100 domains
- 300 mailboxes per domain
- 50 GB shared storage
- Sending included
Agency
For client domains
$29/month
- 1000 domains
- 1000 mailboxes per domain
- 200 GB shared storage
- Sending included
USD prices, billed monthly. Annual options available. Trials require a card and convert to the selected paid plan on the date shown at checkout. Cancel before that date to avoid a charge.
More from TrekMail
An inbox is just the beginning.
Read your business email in TrekMail webmail, or connect your favorite email app. Explore the other products when you need more from your workspace.
Explore email hosting
Email verifierCheck individual email addresses before you use them.Explore email verifier
Cloud DriveStore and share files alongside your email.Explore Cloud Drive
AI agent emailGive your workflows an inbox they can work with.Explore AI agent email
White LabelOffer a branded email experience to your customers.Explore White Label
Good questions. Clear answers.
Questions about allowed senders
Find the details you need, then return to the tool when you’re ready.
Check SPFDoes this tool give an SPF pass or fail?
No. A message SPF result needs a sender IP and envelope domain. This checker looks up DNS and highlights common record issues.
Is a low direct lookup count enough?
No. An include can lead to several more lookups. The displayed count is a starting point and does not prove that evaluation stays within the limit.
Why does SPF pass while DMARC fails?
SPF may pass for a return-path domain that is not aligned with the visible From domain. DMARC needs aligned SPF or aligned DKIM.
Where is an SPF record published?
SPF is published as a TXT record at the sending domain. A domain may have other TXT records, but it should have only one applicable TXT policy beginning with v=spf1.
Can I use this SPF lookup for free?
Yes. Enter a domain and run the check without creating an account. It reads public DNS records; it does not make changes to your domain.
Try another free email tool.
Choose a check, enter your domain and get a result. Or generate a new password in your browser. Every tool is free to use, with no account needed.
Free toolEmail domain checker
See where your domain receives email and which sending records are published.
Check domain
Free toolDKIM record checker
Check that your email provider’s public signing key is available.
Check DKIM
Free toolDMARC record checker
Find out how your domain asks receivers to handle messages that fail checks.
Check DMARC
Free toolMX record lookup
Find the mail servers that receive email for your domain.
Look up MX
Free toolSecure password generator
Choose a length and characters, then generate and copy a fresh password.
Generate password
Put your name on your email.
Create your TrekMail account, bring your domain and follow the setup. Start with free Nano, or try an eligible paid email plan for 14 days.
Nano needs no card. Paid trials require a card.