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My cPanel-hosted domain is being blocked by Gmail with a 550-5.7.26 “authentication required” bounce. I have full DNS-zone access and need an expert to diagnose and correct the records so every check passes. Here are the exact protocols that must be fixed: • SPF • DKIM • DMARC Scope of work • Audit current DNS entries in cPanel/WHM and at the registrar. • Create or adjust the TXT/CNAME records for the items above, ensuring proper alignment. • Propagate changes and run live tests (e.g., Google Postmaster Tools, MXToolbox) until Gmail accepts the messages. • Provide a short hand-over note explaining what was changed and why. Acceptance criteria A test email from my domain must reach a Gmail inbox without errors, showing “pass” for SPF and DKIM and “none/quarantine/reject” handled correctly under DMARC, with no 550-5.7.26 bounce. I’m ready to give immediate DNS access so the job can be completed quickly.
Projekt-ID: 40288204
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15 Freelancer bieten im Durchschnitt ₹1.346 INR für diesen Auftrag

Hi, I have 10 years of experience and knowledge as system administrator setup and management of different Linux Web Hosting Servers, AWS servers,Cloud Servers, GPU Servers, Server Monitoring, Server Security, Server Optimisation, Mailing Servers, Email Marketing, SSL, DNS, Apache, Nginx, etc with Cpanel, Plesk, Virtualmin or other panels. Services such as cPanel/WHM, Plesk, Virtualmin LAMP Stack, Tomcat, MySQL/MariaDB, Zimbra, Postfix mail server, Mailenable, smarter mail, MS SQL,AWS , etc. Please discuss to start. Thank you,
₹2.500 INR in 1 Tag
7,5
7,5

Hi, I have 8+ years of experience in DNS cofiguration, I will configure and manage all required DNS records to correctly connect your domain with the website, server, and email services. This includes setting up all records (A, CNAME, MX, SPF, DKIM, DMARC). The configuration will ensure proper domain resolution, secure website access (HTTPS), reliable email delivery, and smooth integration with hosting, CDN, or third-party services without disrupting existing functionality. All changes will be carefully tested and verified after setup. Please discuss your requirements so we can get started. Thank you
₹1.150 INR in 1 Tag
6,2
6,2

Hi there, I've managed to solve complex email deliverbility issues and would like to assist you. Please let me know a good time to discuss. Thanks!
₹2.200 INR in 7 Tagen
5,7
5,7

Hi, I can help resolve the 550-5.7.26 authentication required issue and make sure Gmail fully accepts mail from your domain. I’ve been working with DNS and email deliverability for over 10 years, including cPanel/WHM environments. I’ll audit your current DNS records, correct or implement SPF, DKIM, and DMARC, and ensure proper alignment so Gmail passes all authentication checks. My process: Review existing DNS records in cPanel and at the registrar Fix or create SPF, DKIM, and DMARC records with correct syntax and alignment Test using tools like MXToolbox and Google Postmaster Tools Send live tests until Gmail shows SPF: PASS, DKIM: PASS, and DMARC policy handled correctly I’ll also provide a short handover note explaining the changes so you can manage the setup confidently going forward. If you can provide DNS access, I can start immediately and resolve this quickly.
₹2.000 INR in 1 Tag
3,8
3,8

Dear Sir/Madam, I can help you quickly resolve the Gmail 550-5.7.26 “authentication required” bounce issue on your cPanel-hosted domain. I have extensive experience configuring SPF, DKIM, and DMARC records and fixing email delivery problems for domains hosted on cPanel/WHM. I will start by auditing your current DNS records in cPanel/WHM and the domain registrar to identify any misconfigurations. Then I will create or correct the required SPF, DKIM, and DMARC TXT/CNAME records to ensure proper authentication and alignment. After applying the changes, I will monitor DNS propagation and run verification tests using tools such as MXToolbox and Gmail tests until emails are successfully delivered to Gmail inboxes without the 550-5.7.26 error. You will receive a short handover document explaining the changes made and recommendations to maintain proper email authentication in the future. I have more than 20 years of experience in IT support, system administration, DNS management, and email security, and I am a Google, Microsoft, IBM, and Apple Certified Technical Support Specialist. I am ready to start immediately once DNS access is provided and can complete the task efficiently. Warm Regards Faraz Ahmad
₹988 INR in 7 Tagen
3,3
3,3

Fixing frustrating Gmail bounces like that 550-5.7.
₹600 INR in 7 Tagen
2,3
2,3

Hello, I am a software engineer with 6 + years of experience in server configuration, email deliverability, and DNS management, and I can quickly diagnose and resolvve your issue.
₹1.050 INR in 1 Tag
0,0
0,0

With an extensive background in software development and app engineering spanning over four years, I can expertly resolve the SPF, DKIM, and DMARC errors you're experiencing with Gmail. I have proven experience in handling complex tasks while ensuring speed, correctness, and minimal disruption to live systems - all critical aspects of this project. My deep understanding of backend APIs, databases (especially PostgreSQL), and cloud infrastructure, aligns perfectly with your needs for auditing DNS entries and creating/adjusting TXT/CNAME records. I'm not only proficient in using tools like Google Postmaster Tools and MXToolbox for live tests but also in optimizing essential components like Nginx configuration through my DevOps skills. My approach is rooted in a clear understanding of requirements before execution, ensuring proper alignment to prevent errors as well as clean, readable, well-documented code that leaves no confusion even post-delivery. Hence, after resolving the issues at hand, you can count on receiving a comprehensive hand-over note explaining the changes made and why they were necessary to avoid any future recurrence. Ultimately, I look forward to seeing test emails from your domain reaching Gmail inbox without a hitch and passing all the authentication protocols successfully.
₹1.500 INR in 7 Tagen
0,0
0,0

Hi, the issue is that your IP address is blacklisted by Gmail. We need to add the required TXT records and also submit a delisting request to Gmail. Please share your concerns in the chat. If you’re interested, I can help you resolve the issue.
₹1.000 INR in 5 Tagen
0,0
0,0

Hello, I can help resolve the Gmail 550-5.7.26 authentication error by properly configuring SPF, DKIM, and DMARC for your domain. This type of issue usually happens when email authentication records are missing, misconfigured, or not aligned with the mail server. I have 3+ years of experience working with Linux servers, cPanel hosting, DNS configuration, and email deliverability troubleshooting. I regularly fix Gmail blocking issues and ensure domains pass SPF, DKIM, and DMARC validation. What I will do: • Audit your current DNS records (SPF, DKIM, DMARC, MX, and mail A records) • Create or correct the required TXT/CNAME records in the cPanel DNS Zone Editor • Ensure proper SPF and DKIM alignment with the sending mail server • Configure a proper DMARC policy for authentication and reporting • Test email delivery using Gmail and tools like MXToolbox until SPF and DKIM show PASS and Gmail accepts messages Once completed, I will provide a short hand-over note explaining what was changed and how you can verify it in the future. I can start immediately once DNS access is provided. Best regards Nikvex Technologis
₹600 INR in 1 Tag
0,0
0,0

Hey, keeping it short and clear. I work in a web hosting / email infrastructure environment (technical support) handling DNS, SPF, DKIM, DMARC, and mail delivery issues regularly. Gmail authentication errors like 550-5.7.26 usually occur due to missing or misaligned SPF/DKIM/DMARC records, and they can be fixed quickly with proper DNS configuration. Quick questions: • Domain using cPanel email or external mail service? • Is DKIM currently enabled in cPanel/WHM? • Any third-party mail senders (website forms, SMTP services)? • Approx DNS provider / registrar managing the zone? Fix Flow: Audit DNS → SPF • DKIM • DMARC records ↓ Check alignment → From domain vs DKIM/SPF ↓ Correct DNS records → TXT / CNAME updates ↓ Enable / regenerate DKIM keys (if needed) ↓ Configure DMARC policy + reporting ↓ DNS propagation verification ↓ Live testing → MXToolbox • Gmail test headers ↓ Validation → SPF PASS • DKIM PASS • DMARC aligned Additional help: • Mail routing verification in cPanel/WHM • Check for duplicate / conflicting SPF records • Verify PTR/HELO if server sending mail • Quick handover note explaining changes Result goal: Test email → delivered to Gmail inbox Authentication → SPF PASS • DKIM PASS • DMARC policy valid No more 550-5.7.26 authentication errors. Ready to start as soon as DNS access is provided.
₹1.299 INR in 2 Tagen
0,0
0,0

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