--- title: "Resources | DuoCircle" description: "Why Businesses Need To Buy SMTP Server For Email Marketing Instead Of Using Free Mail ServersEmail marketing is still valued as an essential tool in digita" image: "https://www.duocircle.com/images/og-default.png" canonical: "https://www.duocircle.com/resources/" --- DuoCircle # Resources Why Businesses Need To Buy SMTP Server For Email Marketing Instead Of Using Free Mail ServersEmail marketing is still valued as an essential tool in digita [ Talk to an Expert → ](/contact/) [ See what we make ](/products/) - **[Spam Protection: Top SpamTitan Alternatives for Your Business](/resources/spamtitan-alternatives)** [read more](/resources/spamtitan-alternatives)… - **[Short Actionable Tips On Email Related Problems Customers Face](/resources/email-tips-problems-solutions)** [read more](/resources/email-tips-problems-solutions)… - **[Office 365 Tenant To Tenant Migration Same Domain Process Explained](/resources/office-365-tenant-to-tenant-migration)** [read more](/resources/office-365-tenant-to-tenant-migration)… - **[A Guide on Azure Tenant to Tenant Migration And How to Choose The Best Office 365 Tenant To Tenant Migration Tool](/resources/azure-tenant-to-tenant-migration)** [read more](/resources/azure-tenant-to-tenant-migration)… - **[Best MSP Partner Programs for Managed Service Providers](/resources/best-msp-partner-programs-for-managed-service-providers)** [read more](/resources/best-msp-partner-programs-for-managed-service-providers)… - **[Traveling Overseas? Here’s How To Reduce Exposure To Hacks or Phishing Scams](/resources/traveling-overseas-reduce-exposure-to-phishing-scams)** [read more](/resources/traveling-overseas-reduce-exposure-to-phishing-scams)… - **[Know It Better to Protect Yourself Better: UPATRE Malware Spams](/resources/upatre-malware-spams)** [read more](/resources/upatre-malware-spams)… - **[The Growing Number Of Spam And Robo-Calls, And The Impending Penalty](/resources/spam-and-robo-calls-and-impending-penalty)** [read more](/resources/spam-and-robo-calls-and-impending-penalty)… - **[The Cyber Security Upholder, Email Security Committee](/resources/email-security-committee)** [read more](/resources/email-security-committee)… - **[How To Start With DMARC Using DMARC Analyzer](/resources/dmarc-analyzer)** [read more](/resources/dmarc-analyzer)… - **[A Brief Guide On Setting Up GoDaddy DKIM, GoDaddy](/resources/dkim-godaddy)** [read more](/resources/dkim-godaddy)… - **[Publishing DMARC Records After Setting Up DKIM Office 365](/resources/dkim-office-365)** [read more](/resources/dkim-office-365)… - **[Setting Up DMARC, SPF, And DKIM, Namecheap](/resources/dkim-namecheap)** [read more](/resources/dkim-namecheap)… - **[The Importance of Implementing DMARC Records For Your Domain](/resources/dmarc-records)** [read more](/resources/dmarc-records)… - **[How To Identify And Neutralize Phishing Attacks In 2021](/resources/identify-and-neutralize-phishing-attacks)** [read more](/resources/identify-and-neutralize-phishing-attacks)… - **[A Brief Guide On How To Set Up DKIM Cloudflare](/resources/dkim-cloudflare)** [read more](/resources/dkim-cloudflare)… - **[Setting Up DKIM Bluehost In 10 Simple Steps](/resources/dkim-bluehost)** [read more](/resources/dkim-bluehost)… - **[Here’s How You Can Set Up DKIM HostGator](/resources/dkim-hostgator)** [read more](/resources/dkim-hostgator)… - **[A Comprehensive Guide On How To Create DMARC Records For Your Domain(s)](/resources/create-dmarc-records)** [read more](/resources/create-dmarc-records)… - **[A Quick Guide On DMARC Policy & How You Can Set Up DMARC For Your domain in 3 Simple Steps](/resources/dmarc-policy)** [read more](/resources/dmarc-policy)… - **[Learn How DKIM Works & Why DKIM Validation Is Important](/resources/dkim-validation)** [read more](/resources/dkim-validation)… - **[Why It Is Crucial To Check DMARC Records For Your Domain](/resources/check-dmarc-records)** [read more](/resources/check-dmarc-records)… - **[What Is A DKIM Selector, And Where Can You Find It?](/resources/what-is-dkim-selector)** [read more](/resources/what-is-dkim-selector)… - **[A Guide To Setting Up DMARC & Enable DKIM On HostGator](/resources/dmarc-dkim-hostgator)** [read more](/resources/dmarc-dkim-hostgator)… - **[A Guide To Setting Up DMARC In Cloudflare](/resources/dmarc-cloudflare)** [read more](/resources/dmarc-cloudflare)… - **[Setting Up DMARC On Bluehost](/resources/dmarc-bluehost)** [read more](/resources/dmarc-bluehost)… - **[DKIM Selector: What It Is & Why It Is A Crucial Part Of DKIM](/resources/dkim-selector)** [read more](/resources/dkim-selector)… - **[Creating A DMARC Record Using A DMARC Record Generator](/resources/dmarc-record-generator)** [read more](/resources/dmarc-record-generator)… - **[Forensic DMARC & Aggregate DMARC Reports Explained In Brief](/resources/dmarc-aggregate-report)** [read more](/resources/dmarc-aggregate-report)… - **[Why It Is Crucial To Validate DKIM Record Of Your Domain Using A DKIM Record Checker](/resources/dkim-checker)** [read more](/resources/dkim-checker)… - **[DKIM Generator: Create DKIM Keys Securely And Safeguard Your Emails Against Spoofing Attempts](/resources/dkim-generator)** [read more](/resources/dkim-generator)… - **[DKIM, SPF and DMARC, Implement All Three For The Best Email Protection](/resources/dkim-spf-and-dmarc)** [read more](/resources/dkim-spf-and-dmarc)… - **[What Are Some Of The Best Barracuda Alternatives You Should Know!](/resources/barracuda-alternatives)** [read more](/resources/barracuda-alternatives)… - **[Ryuk Ransomware Attacks New Orleans City Government And Proves Once Again That Phishing Is Here To Stay](/resources/ryuk-ransomware-attacks)** [read more](/resources/ryuk-ransomware-attacks)… - **[11 Sendgrid Alternatives For Your Business Email](/resources/sendgrid-alternatives)** [read more](/resources/sendgrid-alternatives)… - **[Best Proofpoint Alternatives For Email Security Solutions](/resources/proofpoint-alternatives)** [read more](/resources/proofpoint-alternatives)… - **[Mimecast Alternatives: The Next Wave Of Cyber Security Solutions](/resources/mimecast-alternatives)** [read more](/resources/mimecast-alternatives)… - **[Why Are So Many People Looking For Mailgun Alternatives And What Are Some Suitable Options?](/resources/mailgun-alternatives)** [read more](/resources/mailgun-alternatives)… - **[Hungarian Post Facing Hard Time As Phishers Target Its Customers: All About This Phishing Scam](/resources/hungarian-post-phishing-scam)** [read more](/resources/hungarian-post-phishing-scam)… - **[Malware And Its Defense Mechanism: Safeguarding Against Metamorphic And Polymorphic Malware](/resources/malware-and-its-defense-mechanism)** [read more](/resources/malware-and-its-defense-mechanism)… - **[Learn All About Locky Ransomware & How You Can Protect Your Systems From This Ransomware](/resources/locky-ransomware)** [read more](/resources/locky-ransomware)… - **[Pros And Cons Of Managed Services Offerings Every IT Manager Know About](/resources/managed-services-offerings)** [read more](/resources/managed-services-offerings)… - **[How Testing An Email Server With The Telnet Client Can Be Helpful In Future Troubleshooting!](/resources/testing-an-email-server-with-the-telnet)** [read more](/resources/testing-an-email-server-with-the-telnet)… - **[Office 365 Migration Services, All You Need To Know When You Migrate Office 365 to Office 365](/resources/office-365-migration-services)** [read more](/resources/office-365-migration-services)… - **[How Does A Phishing Attack Work? : Understanding The Working Of A Phishing Attack](/resources/how-does-a-phishing-attack-work)** [read more](/resources/how-does-a-phishing-attack-work)… - **[Phishing Protection Market Research and Analysis Report](/resources/phishing-protection-market-research-and-analysis-report)** [read more](/resources/phishing-protection-market-research-and-analysis-report)… - **[Phishing Scams And The Simple Ways You Can Protect Yourself](/resources/phishing-scams-and-the-simple-ways-you-can-protect-yourself)** [read more](/resources/phishing-scams-and-the-simple-ways-you-can-protect-yourself)… - **[What is DKIM? DomainKeys Identified Mail Explained](/resources/what-is-dkim)** [read more](/resources/what-is-dkim)… - **[What Is SPF And The Significance It Holds For Online Businesses](/resources/what-is-spf)** [read more](/resources/what-is-spf)… - **[What Is MTA-STS, Combined With TLS-RPT Protocol Ensures Encryption And Prevent Interception Of Emails](/resources/what-is-mta-sts)** [read more](/resources/what-is-mta-sts)… - **[What is DMARC? Domain-based Message Authentication Explained](/resources/what-is-dmarc)** [read more](/resources/what-is-dmarc)… - **[What is TLS-RPT: Understanding The Reporting Mechanism Which Helps Ensure Encrypted Email Delivery](/resources/what-is-tls-rpt)** [read more](/resources/what-is-tls-rpt)… - **[Anti-Spam Solutions Vs. DMARC: Understanding The Difference Between Their Functioning & Why They Are Crucial](/resources/anti-spam-vs-dmarc)** [read more](/resources/anti-spam-vs-dmarc)… - **[What Is RUA Or DMARC Aggregate Report And How It Can Help Identify Email Authentication Issues](/resources/what-is-rua)** [read more](/resources/what-is-rua)… - **[What Is RUF Or DMARC Forensic Report And How It Can Help Your Business In Email Deliverability Tracking](/resources/what-is-ruf)** [read more](/resources/what-is-ruf)… - **[What is BIMI, Understanding BIMI & How It Can Help Prevent Malicious Threats](/resources/what-is-bimi)** [read more](/resources/what-is-bimi)… - **[Perform An SPF Record Check To Confirm That It Doesn’t Have Multiple SPF Records](/resources/multiple-spf-records)** [read more](/resources/multiple-spf-records)… - **[SPF Records Explained, What Are They, How They Work, And How They Can Help In Email Authentication](/resources/spf-records-explained)** [read more](/resources/spf-records-explained)… - **[Using SPF Flattening to Avoid SPF PermError, spf too many DNS lookups](/resources/spf-too-many-dns-lookups)** [read more](/resources/spf-too-many-dns-lookups)… - **[M3AAWG’s Best Practices Document On DMARC Authentication Checklist Aims To Reconcile Gaps And Enhance Email Security](/resources/dmarc-authentication-checklist)** [read more](/resources/dmarc-authentication-checklist)… - **[Email Security-Based MSP Partner Program: MSP Email Security Solutions For MSP Resellers and VAR Resellers](/resources/email-security-based-msp-partner-program)** [read more](/resources/email-security-based-msp-partner-program)… - **[Email Authentication 101: What It Means, What Are Its Various Methods & How It Can Help Safeguard Your Email](/resources/email-authentication)** [read more](/resources/email-authentication)… - **[Email Sender Reputation, Get To Know How It Works & Learn How To Improve It For Increased Customer Engagement](/resources/email-sender-reputation)** [read more](/resources/email-sender-reputation)… - **[Understanding SPF Failure, SPF Record Check, And How To Fix SPF Records Having Multiple IP Addresses](/resources/how-to-fix-spf-records)** [read more](/resources/how-to-fix-spf-records)… - **[What Are SPF Records & How They Can Be Used To Achieve Better Results In Email Deliverability For Your Domain](/resources/spf-records)** [read more](/resources/spf-records)… - **[SPF Record Generator, Create Proper SPF Records For Your Domain & Make Sure It Remains Protected From Spammers](/resources/spf-record-generator)** [read more](/resources/spf-record-generator)… - **[How To Create An SPF TXT Record And Add It To Your Domain](/resources/how-to-create-an-spf-txt-record)** [read more](/resources/how-to-create-an-spf-txt-record)… - **[Using A Robust SPF Record Checker For Protecting Organization’s Reputation And Ensuring Email Deliverability With Error-Free SPF Records](/resources/spf-record-checker)** [read more](/resources/spf-record-checker)… - **[Why Should One Use Hosted SMTP? Does It Guarantee Success?](/resources/why-should-one-use-hosted-smtp-does-it-guarantee-success)** [read more](/resources/why-should-one-use-hosted-smtp-does-it-guarantee-success)… - **[Why Businesses Need To Buy SMTP Server For Email Marketing Instead Of Using Free Mail Servers](/resources/buy-smtp)** [read more](/resources/buy-smtp)… ## Ready to talk? Same-day response from someone technical. We tell you yes or no quickly. If yes, we get to work. [Talk to an Expert→](/contact/)[See what we make](/products/) ```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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