--- title: "Spamexperts Outgoing SPF: How To Configure SPF For Outbound Email | DuoCircle" description: "Configure SpamExperts Outgoing SPF to authorize outbound mail servers, improve email delivery, prevent spoofing, and strengthen your domain’s email security." image: "https://www.duocircle.com/images/og-default.png" canonical: "https://www.duocircle.com/blog/spamexperts-outgoing-spf-how-to-configure-spf-for-outbound-email/" --- Quick Answer SpamExperts Outgoing SPF helps authorize outbound email servers and reduce spoofing. Learn how to configure an SPF record for SpamExperts, verify DNS settings, troubleshoot common errors, and improve email deliverability and security for outbound messages. Share [ ](https://www.linkedin.com/sharing/share-offsite/?url=undefined%2Fblog%2Fspamexperts-outgoing-spf-how-to-configure-spf-for-outbound-email%2F "Share on LinkedIn") [ ](https://twitter.com/intent/tweet?text=Spamexperts%20Outgoing%20SPF%3A%20How%20To%20Configure%20SPF%20For%20Outbound%20Email&url=undefined%2Fblog%2Fspamexperts-outgoing-spf-how-to-configure-spf-for-outbound-email%2F "Share on X/Twitter") [ ](https://www.facebook.com/sharer/sharer.php?u=undefined%2Fblog%2Fspamexperts-outgoing-spf-how-to-configure-spf-for-outbound-email%2F "Share on Facebook") [ ](https://reddit.com/submit?url=undefined%2Fblog%2Fspamexperts-outgoing-spf-how-to-configure-spf-for-outbound-email%2F&title=Spamexperts%20Outgoing%20SPF%3A%20How%20To%20Configure%20SPF%20For%20Outbound%20Email "Share on Reddit") [ ](mailto:?subject=Spamexperts%20Outgoing%20SPF%3A%20How%20To%20Configure%20SPF%20For%20Outbound%20Email&body=Check out this article: undefined%2Fblog%2Fspamexperts-outgoing-spf-how-to-configure-spf-for-outbound-email%2F "Share via Email") ![Outgoing SPF Email](https://media.mailhop.org/duocircle/sendgrid-alternative-1231-1790666308841.jpg) Configuring SpamExperts Outgoing SPF correctly is essential for authenticating outbound email and maintaining reliable message delivery. SpamExperts outgoing filtering helps scan and route messages before they reach recipients, but receiving mail servers still need to verify that the sending infrastructure is authorized to send email on behalf of your domain. Publishing the appropriate SPF record in your DNS allows SpamExperts’ outbound relay infrastructure to pass SPF authentication and helps reduce spoofing, authentication failures, and potential delivery problems. This guide explains how **SpamExperts Outgoing SPF** works and walks through the process of identifying the correct SPF include, adding or updating the record, and testing the configuration after DNS changes. It also covers common SPF mistakes, including duplicate SPF records, incorrect include mechanisms, and missing authorized senders, along with practical steps for troubleshooting and maintaining an accurate SPF policy over time. ## What SpamExperts Outgoing Filtering Is and Why SPF Matters SpamExperts outgoing filtering is an outbound [email security](https://www.duocircle.com/) service used to scan, route, and control outbound messages before they reach the recipient’s mail server. Often provided through N-able, SpamExperts Email Services, WHMCS MarketConnect, or a hosting provider, the outgoing filter helps prevent compromised accounts, scripts, or mailboxes from sending spam through your infrastructure. For SPF to work correctly with Spam Experts, your domain’s DNS must authorize the SpamExperts outbound relay infrastructure. This is done by publishing an SPF record as a TXT record. In most standard deployments, the **required SPF mechanism** is: ``` include:spf.antispamcloud.com ``` A typical Spam Experts SPF record may look like this: ``` v=spf1 include:spf.antispamcloud.com -all ``` This tells receiving systems that servers listed under `spf.antispamcloud.com` and the wider `antispamcloud.com` infrastructure are authorized sending hosts for your domain. Without the correct SPF record, legitimate mail routed through Spam Experts outgoing filtering may fail authentication, increasing the chance of rejection, [spam-folder](https://cybernews.com/news/microsofts-breach-notification-emails-end-up-in-spam-folder/) placement, or disrupted mail delivery.![SMTP Email 1232](https://media.mailhop.org/duocircle/smtp-email-1232-1790667138271.jpg) ### Why outbound SPF is different from inbound filtering Inbound filtering protects your domain from **malicious or unwanted mail**. Outgoing filtering protects recipients and your reputation by ensuring outbound messages are scanned before delivery. _SPF supports this process by allowing receiving systems to verify that the sending IP address is permitted to send for the envelope from address_. For example, if your domain routes SMTP submission through a SpamExperts Outbound Relay such as `smtp.antispamcloud.com` , recipients may see an antispamcloud.com-hosted mail server handling delivery. Your [DNS records](https://www.cloudflare.com/learning/dns/dns-records/) therefore need to declare that infrastructure as valid. #### SPF helps prevent email spoofing Sender Policy Framework, defined in RFC 7208, is designed to reduce email spoofing by letting a domain owner restrict mail servers that can send mail on behalf of a domain. When you configure DNS properly, your SPF record becomes a public policy that **receiving mail exchangers** can check against the primary sending IP, secondary sending IP, or any other authorized mail source. #### SPF is not a replacement for DKIM SPF validates the sending path, while DKIM validates message integrity and domain signing. For best results, use Sender Policy Framework together with DKIM and, where possible, DMARC. Spam Experts outgoing filtering can be part of a broader authentication strategy, but the TXT record in DNS remains essential. ## How SPF Works for Outbound Email Authentication Sender Policy Framework works by comparing the sending IP address against the domain’s published SPF record. When a recipient’s [mail server](https://www.techtarget.com/whatis/definition/mail-server-mail-transfer-transport-agent-MTA-mail-router-Internet-mailer) receives a message, it checks the envelope from address, extracts the domain, and performs a DNS lookup for that **domain’s TXT record**. If the message was sent through Spam Experts and your DNS contains `include:spf.antispamcloud.com`, the receiver expands that include and checks whether the sending infrastructure is listed. If the lookup matches, SPF passes. If not, SPF may fail, especially when the record ends in `-all`. A basic SPF record for Spam Experts often uses: ``` v=spf1 include:spf.antispamcloud.com -all ``` The `v=spf1` tag identifies the record as a **Sender Policy Framework policy**. The `include:spf.antispamcloud.com` mechanism authorizes the sending sources permitted by SpamExperts SPF policy. The -all mechanism produces an SPF fail for sources that are not authorized by the record.![Hosted Email Server 1233](https://media.mailhop.org/duocircle/hosted-email-server-1233-1790667166553.jpg) ### Understanding the SPF mechanisms A record may include several mechanisms, such as `ip4`, `ip6`, `a`, `mx`, and `include`. _For example, an A record mechanism authorizes the IP address behind a hostname, while an MX mechanism authorizes the mail exchanger for the domain_. However, many administrators prefer includes because providers such as Spam Experts maintain the **public IP addresses** behind `spf.*antispamcloud.com*`. This avoids manually tracking every SMTP hostname or changing IP address used by the platform. #### The role of SRS in forwarding Forwarded mail can complicate SPF because the original envelope from address may remain unchanged while the forwarding mail server changes. Spam Experts environments may use an SRS component, or Sender Rewriting Scheme, to preserve authentication during forwarding. [Sender Rewriting Scheme (SRS)](https://forwardmx.net/blog/sender-rewriting-scheme/) rewrites the sender address so SPF can still pass after mail is relayed through another system. #### Helpful SPF tools and references Administrators can use an SPF wizard such as `spfwizard.net` to build a new SPF record or validate syntax. The Open SPF project at `open-spf.org` is also a useful reference for Sender Policy Framework behavior, although RFC 7208 remains the authoritative specification. ## Preparing Your Domain and Identifying the Correct SpamExperts SPF Record Before editing DNS, identify every legitimate outbound source for the domain. This may include your hosting mail server, Microsoft 365, [Google Workspace](https://jumpcloud.com/blog/what-is-google-workspace), an application server, marketing tools, and **Spam Experts outgoing filtering**. You should also determine whether the domain is a root domain, a subdomain, or a client domain managed through a reseller panel. In [Web Host Manager Complete Solution](https://www.openprovider.com/blog/openproviders-whmcs-module)(WHMCS), SpamExperts Email Services may be provisioned through MarketConnect, and account notifications may appear under Email & Notifications. _If the service details are unclear, check N-ableMe documentation or open a support ticket with your provider_.![SMTP Server Mail 1234](https://media.mailhop.org/duocircle/smtp-server-mail-1234-1790667187393.jpg) ### Choosing the right antispamcloud.com include For most cloud users and **local cloud users**, the global include is appropriate: ``` include:spf.antispamcloud.com ``` A complete TXT record may be: ``` v=spf1 include:spf.antispamcloud.com -all ``` Spam Experts may also support regional SPF records where routing is region-specific. These can include: - EU-only: `spf-eu.antispamcloud.com` - US-only: `spf-us.antispamcloud.com` - UK-only: `spf-uk.antispamcloud.com` - AU-only: `spf-au.antispamcloud.com` - CA-only: `spf-ca.antispamcloud.com` - ZA-only: `spf-za.antispamcloud.com` For example, an EU-only configuration may use: ``` v=spf1 include:spf-eu.antispamcloud.com -all ``` In most cases, however, `include:spf.antispamcloud.com` is safer unless your provider explicitly instructs you to use a **regional SPF record**. #### Branded SPF records for providers Some resellers use a branded SPF record for clients’ SPF records. For example, a provider may publish a branded include that ultimately references `spf.antispamcloud.com` or other `antispamcloud.com` mechanisms. If you manage a client domain, confirm whether the DNS provider instructions require the standard Spam Experts include or a provider-specific hostname such as `release.antispamcloud.com` for related release actions. ## Step-by-Step Guide to Adding or Updating Your SPF DNS Record ![Email Sending Services 1235](https://media.mailhop.org/duocircle/email-sending-services-1235-1790667205301.jpg) ### Step 1: Find the current SPF TXT record Log in to your domain provider or DNS provider and locate the [DNS zone](https://bunny.net/academy/dns/what-are-dns-zones-and-dns-records/) for the domain. Look for an existing SPF record published as a TXT record. It will usually start with `v=spf1`. Important: a domain should have only one SPF record. Multiple SPF TXT records can cause SPF permerror results. If an existing SPF record is present, do not create a duplicate. Instead, modify SPF record content and add to **SPF record mechanisms** as needed. ### Step 2: Add SpamExperts to the SPF policy If no SPF exists, create a new [SPF record](https://www.duocircle.com/content/sender-policy-framework/spf-record/) as a TXT record at the root of the domain: ``` v=spf1 include:spf.antispamcloud.com -all ``` If an existing SPF record already authorizes other services, add `include:spf.antispamcloud.com` before the final all mechanism. For example: ``` v=spf1 include:_spf.google.com include:spf.antispamcloud.com -all ``` If your current policy uses `~all`, you may keep it during testing, but `-all` is stricter and tells receivers to **reject unauthorized senders**. Use `-all` only when you are confident all authorized sending hosts are included. #### Example with local and cloud senders If your own mail server sends directly using an A record or static IP address, combine it with Spam Experts: ``` v=spf1 a mx ip4:203.0.113.10 include:spf.antispamcloud.com -all ``` This allows your domain’s A record, [mail exchanger](https://verifalia.com/help/email-validations/what-is-a-mail-exchanger-mx), a specific IP address, and Spam Experts outgoing filtering through antispamcloud.com. Keep the record concise because Sender Policy Framework has DNS lookup limits. ### Step 3: Save and allow DNS propagation _After you configure DNS, save the TXT record and allow time for DNS to propagate changes_. The TTL value controls how long **DNS server caches** may retain the old data. A low [Time-To-Live(TTL)](https://www.f5.com/glossary/time-to-live-ttl) can speed up changes during migration, but propagation still depends on resolver caching. If your outbound SMTP hostname is `6205.submission.antispamcloud.com`, continue using that for SMTP submission as instructed by your provider; the SPF record only authorizes the outbound path and does not replace SMTP credentials or relay configuration. ## Testing, Troubleshooting, and Maintaining Your SpamExperts Outgoing SPF Setup ### Verify SPF after publishing Once DNS has propagated, query the [TXT record](https://en.wikipedia.org/wiki/TXT%5Frecord) using a DNS lookup tool and confirm the domain returns a single SPF record containing `v=spf1` and `include:spf.antispamcloud.com`. You can also use `spfwizard.net`, command-line tools such as dig TXT example.com, or platform diagnostics from your hosting provider. Send a test message through the Spam Experts outgoing filter and inspect the **authentication headers**. A successful result should show SPF passing for the envelope from address when the sending IP address belongs to authorized `antispamcloud.com` infrastructure.![Email Smtp Service 1236](https://media.mailhop.org/duocircle/email-smtp-service-1236-1790667227552.jpg) #### Common configuration mistakes The most common issue is publishing more than one SPF record. Another frequent problem is replacing the existing SPF record instead of merging mechanisms, which accidentally removes another **mail server or application sender**. Also check for typos such as missing include:, incorrect hostnames, or placing `-all` before all mechanisms are listed. If SPF fails, confirm whether your account uses the global `spf.antispamcloud.com` record or one of the regional SPF records such as `spf-us.antispamcloud.com`, `spf-uk.antispamcloud.com`, or `spf-au.antispamcloud.com`. For N-able or Spam Experts environments, your provider can confirm the correct Outbound Relay configuration. #### Maintain the SPF record over time Review DNS records whenever you add a new application, migrate a mail server, change SMTP routing, or onboard a client domain. The SPF record should reflect all current authorized sending hosts while avoiding obsolete services. Maintaining accurate [Sender Policy Framework](https://www.duocircle.com/content/sender-policy-framework/sender-policy-framework-example/) data helps Spam Experts outgoing filtering protect reputation and preserve **reliable mail delivery**. ![Brad Slavin](https://media.mailhop.org/dmarcreport/images/team/brad-slavin.jpg) Brad Slavin General Manager General Manager at DuoCircle. Product strategy and commercial lead across the email security portfolio. ## Secure your email infrastructure Protect, authenticate, and deliver. Contact our team to find the right solution. [Contact Sales](/contact/) [Explore Products](/products/) Share this article [ ](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fwww.duocircle.com%2Fblog%2Fspamexperts-outgoing-spf-how-to-configure-spf-for-outbound-email%2F) [ ](https://twitter.com/intent/tweet?text=Spamexperts%20Outgoing%20SPF%3A%20How%20To%20Configure%20SPF%20For%20Outbound%20Email&url=https%3A%2F%2Fwww.duocircle.com%2Fblog%2Fspamexperts-outgoing-spf-how-to-configure-spf-for-outbound-email%2F) [ ](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fwww.duocircle.com%2Fblog%2Fspamexperts-outgoing-spf-how-to-configure-spf-for-outbound-email%2F) Copy Related Articles - [ ![spf record qualtrics](https://media.mailhop.org/duocircle/spf-record-checker-1121-1786967008527.jpg) 10 Steps to Validate Your Qualtrics SPF Record Before Launch Blog ](/blog/10-steps-to-validate-your-qualtrics-spf-record-before-launch/) - [ ![ARC Seal Verification](https://media.mailhop.org/duocircle/spf-record-checker-0681-1784617393113.jpg) 7 Steps To Verify ARC Seals Using Popular Email Header Analysis Tools Blog ](/blog/7-steps-verify-arc-seals-popular-email-header-analysis-tools/) - [ ![Public Folder Migration](https://media.mailhop.org/duocircle/office-365-migration-1001-1786097361140.jpg) 9 Backup and Recovery Tips Before Public Folder Migration Blog ](/blog/9-backup-and-recovery-tips-before-public-folder-migration/) - [ ![Qualtrics SPF Setup](https://media.mailhop.org/duocircle/spf-record-checker-6201-1790062607857.jpg) How To Configure Qualtrics SPF: A Step-By-Step Guide To Setting Up Your SPF Record Blog ](/blog/configure-qualtrics-spf-step-by-step-guide-setting-spf-record/) ## Related Articles [ tutorials 10 Steps to Validate Your Qualtrics SPF Record Before Launch Aug 17, 2026 ](/blog/10-steps-to-validate-your-qualtrics-spf-record-before-launch/)[ tutorials 7 Steps To Verify ARC Seals Using Popular Email Header Analysis Tools Jul 21, 2026 ](/blog/7-steps-verify-arc-seals-popular-email-header-analysis-tools/)[ tutorials 9 Backup and Recovery Tips Before Public Folder Migration Aug 7, 2026 ](/blog/9-backup-and-recovery-tips-before-public-folder-migration/)[ tutorials How To Configure Qualtrics SPF: A Step-By-Step Guide To Setting Up Your SPF Record Sep 22, 2026 ](/blog/configure-qualtrics-spf-step-by-step-guide-setting-spf-record/) ```json {"@context":"https://schema.org","@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. 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Trusted by 50,000+ organizations since 2014.","subOrganization":[{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138898167","name":"DMARC Report","url":"https://dmarcreport.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897912","name":"Phish Protection","url":"https://www.phishprotection.com"}]}} ``` ```json [{"@context":"https://schema.org","@type":"BlogPosting","headline":"Spamexperts Outgoing SPF: How To Configure SPF For Outbound Email","description":"Configure SpamExperts Outgoing SPF to authorize outbound mail servers, improve email delivery, prevent spoofing, and strengthen your domain’s email security.","url":"https://www.duocircle.com/blog/spamexperts-outgoing-spf-how-to-configure-spf-for-outbound-email/","datePublished":"2026-09-29T00:00:00.000Z","dateModified":"2026-09-29T00:00:00.000Z","dateCreated":"2026-09-29T00:00:00.000Z","author":{"@type":"Person","@id":"https://www.duocircle.com/authors/brad-slavin/#person","name":"Brad Slavin","url":"https://www.duocircle.com/authors/brad-slavin/","jobTitle":"General Manager","description":"Brad Slavin runs DuoCircle, the company behind DMARC Report, AutoSPF, Phish Protection, and Mailhop. 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