Fix SMTP Reverse DNS Mismatch

@rajat07me

Hi James, I can help you resolve the “Reverse DNS does not match SMTP Banner” issue and ensure your outbound mail is delivered reliably. I’ll: Update the PTR/rDNS record for your dedicated IP so it matches the correct hostname. Adjust your SMTP HELO/EHLO banner to align perfectly with that hostname. Verify full alignment with standard checks (PTR, A, MX, SPF, DKIM). Run MXToolbox, mail-tester, and other tests, providing screenshots/reports confirming the issue is fully resolved. I’ll need access to your DNS zone and mail server configuration. I can complete this quickly and will ensure no new errors are introduced.

@AwaisChaudhry

Hello, I’m Muhammad Awais, and I will fix your Reverse DNS mismatch so outbound mail from your dedicated IP no longer triggers rDNS/HELO warnings. I will confirm the PTR/rDNS value that should resolve to a hostname, update the DNS zone and adjust the SMTP banner to exactly match that hostname and certificate name. I’ll ensure PTR, A, MX, SPF, and DKIM checks align and then run MXToolbox, Mail-Tester, and other standard tests, sharing clear reports that show zero mismatches and no new errors. Deliverables: Updated PTR/rDNS pointing to the chosen hostname; SMTP banner aligned; test results with screenshots and reports. Turnaround: I estimate 2 days after access is provided. I’ll coordinate with you to plan a quick window. Access needed: DNS admin creds and server access as required; any specifics on your hosting provider. Are you ready for me to proceed with updating PTR to your chosen hostname and aligning the SMTP banner, and can you provide DNS and server access details to start? 1) Confirm PTR/rDNS hostname to use and whether it should match HELO/EHLO. 2) Do you own the DNS zone and PTR control, or who handles those updates? 3) What SMTP server software and version are you running (to adjust the banner correctly)? 4) Any constraints on downtime or testing window? 5) Do you want me to deliver MXToolbox and Mail-Tester reports with explanations? Best regards,

@tangramua

Dear ,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in PHP, Linux, Troubleshooting, DNS, Email Marketing, Network Administration, Email Handling, SMTP and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.    Best regards, Sales department Tangram Canada Inc.     

@webperfection123

Hi Mate, I will resolve the “Reverse DNS does not match SMTP Banner” warning by updating your PTR record to align with the HELO/EHLO banner. After making these adjustments, I will run the necessary tests using tools like MXToolbox and mail-tester to ensure everything is functioning correctly and share the results with you. I estimate that the job should take a couple of hours to complete. For access, I’ll need the credentials for your DNS zone and mail server. I’ve worked extensively with DNS configurations and SMTP setups, so I’m confident in delivering a precise fix. Best Regards, Priyanka

@gamdurbhullar

Hello sir can you please discuss on chat i am ready to start work right now

@ranjika08

Hi, I can fix your “Reverse DNS does not match SMTP Banner” issue by updating your PTR/rDNS record to match your SMTP/HELO banner and ensuring all verification checks (A, MX, SPF, DKIM) pass. I’ll test thoroughly with MXToolbox and mail-tester, providing screenshots/reports showing zero errors. Could you provide DNS and server access so I can start? Let's discuss in chat to proceed further.

@kuldeepvk

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

@farooqtahir2013

Being a Network and System Engineer with over 10 years of experience, I understand the technicalities involved in projects like yours. I have extensive understanding and hands-on expertise in DNS, Linux, Network Administration and PHP which will be crucial to diagnose and solve your SMTP reverse DNS mismatch problem. Having worked not just with small-sized businesses but also with larger enterprises, I fully recognize the importance of smooth and non-interrupted email communication for any business and I assure you, my proven troubleshooting skills combined with my familiarity with multiple vendors make me an ideal fit for your project. Also, one thing which I provide exceptionally is around-the-clock availability along with quick response time; so that if there is any hiccup along or even after the completion of this project, I am right there to tackle it. While I am confident about delivering 100% satisfactory results within a fast turnaround time, let’s indeed ensure this promptly ends well without any compromise on quality.

@widichamp

Hello James! I understand the need to address the "Fix SMTP Reverse DNS Mismatch" issue on your mail server efficiently. I am experienced in PHP, Linux, DNS, and SMTP, making me well-equipped to tackle this precise task. My approach involves thorough troubleshooting to ensure a perfect match between Reverse DNS and SMTP Banner, thus resolving the warnings effectively. Please do check out my profile for project reviews and portfolio at: https://www.freelancer.com/u/widichamp I would love to discuss your project in more detail and share ideas to make it a success. Let me know a convenient time to connect! Best Regards, Abdul Waheed

@talhamq

With over 10 years of experience in managing and troubleshooting a wide range of servers and email systems, I am confident that I can quickly and efficiently fix the SMTP reverse DNS mismatch you are facing. It is important to note that I have extensive experience with Windows Server technologies as well as many of the most popular Linux distributions, ensuring that your unique needs will be met regardless of your server’s operating system.

@Joya1996

Hi, I can align your mail server’s PTR/rDNS record with the SMTP/HELO banner so outbound emails pass verification and avoid spam issues. I’ll update the DNS and server configuration, then run tests via MXToolbox and mail-tester, providing full reports showing the fix. Could you share access to your DNS zone and mail server so I can begin? Let's discuss in chat to proceed further.

@hireageek

Hi there, I understand the urgency of resolving the "Reverse DNS does not match SMTP Banner" issue that’s affecting your email deliverability. As a top freelancer based in California with extensive experience in SMTP configurations and DNS management, I am confident in my ability to align your rDNS record with your HELO/EHLO banner effectively. This will ensure that all verification checks pass, preventing your outbound messages from being rejected or marked as spam. I will directly work on your existing DNS zone, updating the PTR record and adjusting the server banner to achieve that clean match you’re seeking. Once these adjustments are made, I will conduct thorough tests using tools like MXToolbox and mail-tester, providing you with detailed reports or screenshots to confirm the resolution of the mismatch and the absence of any new errors. Please let me know your estimated turnaround time and any access details I’ll need. I’m ready to get started right away! What access details will you provide to allow me to adjust the DNS and SMTP settings?

@giaphung2k1

Hello I will diagnose your SMTP reverse DNS mismatch, identifying the correct hostname and IP. I'll then collaborate with your ISP to ensure the PTR record is updated to match your mail server's hostname, eliminating the "reverse DNS does not exist" error and improving email deliverability. Fast, effective resolution. Giáp Văn Hưng

@vinnie6669

Greetings! I have 15+ years of experience working as a Linux System Administrator. I give full server management support. I will fix your mail server for rdns or any other issue. Let's disucuss and start. Thanks Vivek Sharma

@abhisaini0188

As a seasoned Web & Mobile Application Developer, my 10+ years of experience perfectly position me to tackle your SMTP Reverse DNS Mismatch issue. A core component of my skillset is working with Linux, which aligns perfectly with the problem you're experiencing. I've also mastered PHP, which means I can expertly manipulate your existing DNS zone and SMTP configuration, resolving the mismatch between the rDNS record and the HELO/EHLO banner. Furthermore, I have extensive knowledge of mail systems, including Outlook, giving me an extra edge when it comes to analyzing and fixing email-related problems such as yours. My proficiency in frontend, backend, cloud and ERP systems ensures a comprehensive approach to solving your task. Lastly, I firmly believe that communication and delivering results on time are essential for any successful project, and that's what you can expect from me. With a commitment to delivering clean, secure and maintainable code along with on-going support, choosing me for this project will guarantee a lasting solution to your SMTP troubles, restoring seamless operation of your mailing system.

@ArchnaAdmin

Hi, I have 8+ years of experience as a System Administrator in the setup, management, and optimization of Linux-based web hosting servers, including AWS, cloud servers, and GPU servers. My expertise covers server monitoring, security hardening, performance optimization, mailing servers, email marketing systems, SSL certificate installation, DNS management, Apache, and Nginx, working with cPanel, Plesk, and other control panels. I ensure secure, stable, and high-performing server environments tailored to business and production needs. Please feel free to discuss your project requirements to get started. Thank you.

@Feriver

Hello, I understand you’re looking for. a precise fix to eliminate the Reverse DNS and SMTP banner mismatch that is affecting outbound mail delivery and reputation. I have hands-on experience aligning PTR, A, MX, SPF, and DKIM records with SMTP HELO/EHLO banners on Linux-based mail servers using Postfix, Exim, and Sendmail, ensuring full compliance with common anti-spam checks. My approach focuses on correcting the PTR record at the IP owner level, validating forward-confirmed reverse DNS, and updating the SMTP banner so it matches the resolved hostname exactly. I carefully verify that the hostname maps cleanly to the correct A record and does not conflict with existing MX or SPF policies. Once alignment is complete, I run structured validation using MXToolbox, mail-tester, and direct SMTP handshake checks to confirm that rDNS, HELO, and banner consistency errors are fully resolved without introducing new warnings. I work directly within existing DNS zones and server configurations, apply minimal-impact changes, and document each update clearly. The end result is improved deliverability, reduced spam filtering, and a clean verification profile suitable for Outlook and external mail providers. Thanks, Asif

@ExpertNetworkEng

Hello, I’m a Senior Network & Security Engineer with 10+ years of hands-on experience designing, implementing, and migrating enterprise and service-provider networks. I specialize in Network Security, SD-WAN, routing & switching, enterprise wireless, and secure network architecture, helping companies modernize legacy networks, improve reliability, and reduce WAN costs. Core expertise: - Firewalls & Security: FortiGate, Palo Alto, Cisco ASA / Firepower IPsec & SSL VPN, site-to-site, remote access, policy design - Routing & Switching: Cisco ASR/ISR, Catalyst, Nexus, Juniper Routers (M10, MX 960) and SRX 500 (BGP, OSPF, EIGRP, IS-IS, MPLS, VLANs, STP, HSRP/VRRP) Enterprise LAN & campus design - LAN Switching (Multi-Vendor): Cisco, Juniper, Meraki, HP, Aruba, FortiSwitch Access/core design, redundancy, QoS, segmentation - Enterprise Wireless: Cisco WLC & APs, Cisco Meraki Wi-Fi, Ubiquiti, Aruba Wi-Fi, FortiAP Coverage design, roaming, security, troubleshooting - SD-WAN: Fortinet SD-WAN, Cisco SD-WAN (Viptela), Cisco Meraki (hub-and-spoke, MPLS + Internet, segmentation, HA, traffic steering) - Cloud & Hybrid Networking: AWS / Azure / GCP Site-to-site VPN, routing integration - Network Automation: Python Certifications: CCIE Enterprise Cisco Certified Specialist – Enterprise SD-WAN Implementation CCNP Data Center CCNP Security Juniper JNCIA-Junos, JNCIA-Cloud If you share your current setup and goal, I can propose a clear and practical solution. Best regards,

@lawrence37

Hi, I will be able to knock this out for you within an hour and have immediate availability Lawrence A little about me: I have over 20 years system administration experience with a number of distributions of linux / unix and windows server, working for a large number of blue chip companies here in the UK. I’m full time freelance and also run multiple popular hosting companies - therefore it’s very rare there’s an issue I’ve not come across before. Skill-List (Including but not limited to): Windows 2000-2022 Server Exchange 5.5-2019, Exchange Hybrid, Office365 Linux / Unix Administration SAN Storage (NetApp, EMC Clariion, HP MSA/EVA/Lefthand) Server Virtualization (Vmware ESX, XenServer, Openstack) Desktop Virtualization (Vmware View, Xen Desktop) Application Virtualization (Thinapp, Xenapp) Networking (Cisco, Juniper, HP, Extreme, Ubiquiti) Firewall / IDS (Cisco, Fortigate, Juniper) Backup (CA Arcserve, HP Data protector, R1Soft, Veeam) Server administration (MsSQL, MySQL, Oracle (inc forms & reports), InnoDB, IIS, Apache, SCCM, WSUS) VoIP Solutions (Nortel, Avaya, Shoretel, Asterisk, FreePBX) Penetration Testing / Server Security/Hardening WHMCS, DirectAdmin, Plesk, cPanel, Webmin AWS, Azure Config/Management