Fix Gmail SMTP Auth Error

@seefattechnologi

SURE--------I will help you for sure to Fix Gmail SMTP Auth Error effectively --I am an INNOVATIVE .NET/ IIS/C# Full stack developer having great expertise with all the latest CRM and Frameworks. I will deliver you high quality work . I have some queries to give you accurate time and price Please ping me to get started and provide you great results. Thanks

@reedsystems

Hi, I read your project description, and I'd like to help. I can help you debug the SMTP error, figure out where the issue is, fix it, and provide you with a detailed explanation of how the fix was done for future reference.

@devbaloni1983

Hello, Hope you're doing well! I am a .NET Developer specializing in robust backend systems, enterprise solutions, and scalable APIs. I help businesses streamline operations by building fast, secure, and reliable applications. What I Can Build 1. .NET Core REST APIs 2. Enterprise management systems (HR, CRM, Inventory) 3. MVC / Razor-based web applications 4. SQL Server database design & optimization 5. JWT authentication & role-based access 6. Cloud deployment on Azure/AWS 7. Reporting modules, logs, analytics Why Me? 1. Strong understanding of backend architecture 2. Clean, modular code that scales 3. Strong problem-solving & debugging 4. On-time delivery with clear documentation 5. Experience in both small & large enterprise systems Let's Discuss Send me your project requirements and I’ll provide: 1. Best backend architecture 2. Timeline breakdown 3. Project cost details Looking forward to delivering a powerful solution for you!

@zulqrn

Hi there, I'm a System & Network Administrator with 7 years of hands on experience. I would like to assist you in this. Please let me know a good time if we can discuss. Thanks !

@merinsinha

I can do it. As 9+ years experiences in these field. I can give good quality work. I have read the guidelines of your work.I believe that i can provide you the best quality works you are anticipating from this platform give me a chance to show you the best i can do at your service.

@Edoublin

Hello. How are you? I have carefully reviewed your requirements. I can fix gmail SMTP issue in few minutes. I am a senior full stack developer with over 10 years experience. Please contact me. Thank you.

@HiraMahmood4072

Hi, I hope you're doing well. I understand you're looking for Fix Gmail SMTP Auth Error I am the ideal candidate for your project. I have read the provided job description and I understand what you are looking for. I have over 10+ years of experience .NET, C# Programming, IIS, Windows Server, Web Services, ASP.NET, Web Development, SMTP .Please feel free to further discuss the requirements and timeline for the project. I'd be happy to assist you. I am ready to start right now. ✅ No Upfront Payment ✅ Release Milestone After Completion ✅ 100% Project Completion Rate You can visit my Profile https://www.freelancer.com/u/HiraMahmood4072 Thank you

@moha262

Hello, I have thoroughly analyzed your project requirements and identified that my core competencies in Web Development, SMTP, .NET, Windows Server, ASP.NET, Web Services, C# Programming and IIS align precisely with your technical specifications. With a decade of specialized experience in this domain, I bring proven expertise in implementing industry-standard methodologies and delivering production-ready solutions. My approach involves: - Technical Assessment: Comprehensive evaluation of project scope, technical constraints, and deliverable requirements - Strategic Planning: Development of detailed implementation roadmap with milestone tracking - Quality Assurance: Rigorous testing protocols and quality control measures throughout the development lifecycle - Timely Delivery: Proven track record of meeting deadlines while maintaining exceptional quality standards I am particularly adept at handling complex technical challenges and implementing scalable solutions that exceed client expectations. My methodology emphasizes precision, efficiency, and adherence to best practices in Web Development, SMTP, .NET, Windows Server, ASP.NET, Web Services, C# Programming and IIS. I would welcome the opportunity to discuss your project's specific technical requirements, timeline expectations, and success metrics in greater detail. Please feel free to schedule a consultation at your convenience. Thank you for considering my proposal. I look forward to the possibility of collaborating on this

@vps8

Hi, I can check and fix this Gmail SMTP Auth Error “5.7.0 Authentication Required.” . I have over five years of experience as a systems administrator, working with Linux distributions like CentOS, AlmaLinux, Ubuntu, Debian, Red Hat, and Windows servers. I manage WHM/cPanel, CWP, Plesk, Virtualmin, Hestia, and VestaCP, along with AWS, DigitalOcean, Azure, Docker, and Docker-Compose. My expertise includes DNS management, mail servers (Zimbra, Postfix, Exim, Office 365, Google Workspace), and web servers such as Apache and Nginx and also configure Open Source Storage app ( NextCloud, OwnCloud ). I also handle WordPress, Magento, Laravel, Node.js, and PHP applications. I have strong experience working with databases like MySQL, MariaDB, MongoDB, and PostgreSQL, as well as integrating and managing Cloudflare services. My skills also cover proficient management of email services and web hosting. Kindly chat once. Thank you

@tnowsolutions

Hi there, I am Asp.net expert, Just read the project , Willing to start and fix the issue as soon possible please come to the chat box so we can easily discuss in details, thank you

@rajeshrolen

Hello, I went through your project description, and it seems like I am a great fit for this job. I am an experienced professional with many years of hands-on experience in .NET, C# Programming, IIS, Windows Server, Web Services, ASP.NET, Web Development, SMTP Please come over chat and discuss your requirement in a detailed way. Regards, Rajesh Rolen

@andriip30

Hello, hope all is good. I understand your goals and will deliver clear work on time while keeping you updated. I have 10+ years of experience in Web Development, .NET, C# Programming. I have completed similar projects. Visit my profile to check latest work, client ratings and quick examples. If this sounds good, connect in chat and we can start. Regards.

@bushrar60

With a broad-ranging skill set featuring competencies in .NET framework, ASP.NET and SQL Server, I am confident in my ability to diagnose and correct the issue that you're facing with your Gmail SMTP. My experience extends to working on similar web-service applications and addressing authentication problems. In addition, I have solid knowledge of email system configurations and server network rules that will come in handy for identifying the potential causes of the "5.7.0 Authentication Required" error. Moreover, my proficiency with Angular 12, ReactJS, and Chrome Extension Development reflects my adaptability to different environments, translating any potential hurdles into opportunities for creative problem-solving. Utilizing my expertise in HTML5, CSS, Javascript, JQuery and Bootstrap, I can assure you a meticulously crafted approach to reinstating the email functionality of your web-service application. Regards bushra.

@alanb04

Hello there. This is exactly the kind of precise SMTP debugging task I enjoy solving. Experience: • Fixed Gmail SMTP authentication failures for a legacy ASP.NET MVC system hosted on Windows Server where Google blocked basic login—implemented App Password + TLS 1.2 and restored 100% delivery. • Diagnosed IIS-hosted web service email failures caused by incorrect enableSsl and port mismatch (25 → 587), reducing email errors from constant failures to stable production sending. • Reconfigured secure SMTP relay for enterprise apps with strict firewall policies and outbound port filtering, ensuring compliant and secure email transmission. • Applied OpenClaw-style monitoring logic to backend services to automatically detect and log email delivery failures for faster future debugging. I’ve solved multiple “credentials are correct but SMTP fails” cases where the real issue was hidden (Google security blocks, TLS mismatch, or server firewall policies). In one case, a production web service failed for weeks due to 5.7.0 errors. I identified it was caused by Google disabling basic auth and fixed it in under 2 hours using App Password + TLS enforcement. That same systematic debugging approach is exactly what your situation needs. Warmly looking forward to helping you get your emails sending flawlessly again!

@morojojoizel

Hello. How are you? I can fix your problem in some minutes. I've checked your project description " Fix Gmail SMTP Auth Error". I am a senior full stack developer with over 10 years experience. I have extensive experience with gmail SMTP. Please contact me. Thank you. Joizel Morojo

@kunalkakkad

I have recently done the similar fix in one of my clients ASP.Net applications And the issue most likely lies in Gmail SMTP configuration. Kindly let me know how soon we can connect so I can understand better and complete it within a day. Regards, Kunal K.

@TuPhong

The error may be caused by the App Password configuration. Please confirm that App Passwords are enabled on the account and share the generated password for integration into the C# source code.

@DesmondTwoTwo

I've just completed a project similar to this one. The SMTP section often causes errors like 5.7.0 Authentication Required, requiring precise SSL settings and authentication tweaks. Many developers overlook account security settings or fail to align port configuration with Gmail’s policies. I bring skills in ASP.NET configuration and email server setup. While I am new to Freelancer, I have extensive experience and have completed many projects off site. Contact me for a free consultation to clarify your setup without any pressure. Regards, Stefan Brink.