Ubuntu Linux Postfix SMTP, DNS, DKIM, SPF troubleshooting and reinstall some certificates

Hello, I'm extremely excited because I recently had a very similar experience. I'm confident that I can complete your task perfectly as soon as possible in a short amount of time, and I'm sure you'll be pleased with the results. Let me quickly introduce myself.

As an experienced and certified IT professional, I believe that I am the perfect fit for your project. With my extensive knowledge in Linux distributions, especially Centos, Ubuntu, and Debian, I can troubleshoot and configure your Ubuntu Linux Postfix SMTP to not only fix your secure email rejections but also resolve the DNS, DKIM, SPF troubleshooting issues you're facing. My familiarity with server hosting platforms like Hetzner will ensure a smooth and efficient process throughout this project. Moreover, my expertise in network administration will come in handy when correcting any potential issues with rDNS, MX records or other network configurations on the Hetzner DNS panel. I also have vast experience with certificate management which includes working with Let's Encrypt SSL certificates. This allows me to not just configure them for Dovecot and ISPConfig 3 but also ensure functional SSL across your system. My problem-solving skills have been sharpened over the years as an Azure Solutions Architect and Administrator. Migrating from on-premise to cloud platforms while maintaining affordable uptime is a challenge I’ve faced often and won. With your live 18-website system, I understand the significance of time and minimal disturbances. Trust me to get your issue resolved within our agreed timeframe of about 2 weeks while keeping all your sites running.

Hello, We have read your project and would be happy to help you with the task of fixing the mail problem We can begin the work now . We are a professional server-cloud infrastructure management company with over 10 years of experience. Currently, we manage less than 400 servers, including cloud instances, dedicated boxes, and VPS boxes.  We would be delighted to speak more about the project over chat and work on a solution. Do pings in chat so that you can get to know us better. Regards Skynats Team 

Hi I have good experience of hetzner and also good experience of postfix as i have good experience of system administrations. good experience of ISPConfig , Mariadb Postfix, SMTP etc I have good experience of mail services.

Greetings! I have more than 14+ years of experience working as a Linux cloud and network admin. I give full server management support. I will do the server setup for you as per your requirement now. Thanks Vivek Sharma

As a seasoned IT professional with 8 years of Linux system administration experience, I have encountered and successfully resolved multiple server configuration challenges -- many of which are similar to the issues you currently face. My understanding of Ubuntu Linux, Postfix SMTP, DNS, DKIM, SPF troubleshooting is extensive, and has been honed through years of practical experience in the field. Additionally, I am well versed in precisely what makes secure emails work or fail, having dealt with the exact same email rejection and certificate warnings you're currently facing. I am confident this knowledge can vastly improve your email communications with Google, Microsoft, and other provider

Hi, I understood your problem, please connect with for solution of email sending problem, i am waiting for positive response from you. Regards, Fahad.

Hi there I have extensive experience in server management and secure email setup. I can help you resolve the email delivery issues with Google and Microsoft, as well as address the SSL certificate warnings from Kaspersky. I am familiar with Zabbix installation and configuration, and can assist in setting up Let's Encrypt certificates for Dovecot and ISPConfig 3. I will ensure that the server setup follows best practices and does not disrupt the 18 live websites hosted on it. I am confident that I can complete the project within the 2-week timeframe and deliver a secure and efficient server setup for your company near Vienna, Austria. Please go through my profile its 15 years old see the work I did over the years. ---> No Win No Fee means that your satisfaction is my utmost priority. <---- Lets discuss the job details. Moreover, I am willing to start the job and perform tasks without even being hired; it is just to show my commitment to this project. Looking forward to hear from you. Regards Shah

Hi there, having 10+ years of System Administration experience, I'll be perfect fit for this project. I'm sure I'll be able to solve your task quickly and reliably. I'll need remote access (ssh) to the server and might possibly need access to your DNS registrar account (or you might need to adjust DNS records with information I'll share with you).

Dear Alexander, Based on your project details, it seems like you are facing some email delivery issues and certificate warnings on your server hosted at Hetzner. I understand the importance of resolving these issues promptly to ensure smooth communication for your company. To address the problems you are encountering, we propose the following steps: - Troubleshoot Postfix SMTP configuration to resolve email rejection by Google, Microsoft, and others. - Investigate and fix DNS, DKIM, and SPF settings for proper email authentication. - Reinstall certificates for secure email communication and eliminate Kaspersky certificate warnings. - Configure Let's Encrypt certificates for Dovecot and ISPConfig 3 to ensure SSL functionality. - Install Zabbix for server monitoring and management. Before proceeding, could you provide more details about your current email setup and any specific errors you are encountering? This will help us tailor our solutions to meet your exact requirements. Looking forward to working together to enhance the performance and security of your server. Warm regards,

Hello, I’m an IT expert with over 20 years of experience in the industry. I hold certifications as a Cisco Certified Networking Professional (300-100 and 300-115), Linux Certified Professional (LPI 101, 102, 103), Red Hat Certified System Administrator, VMware Certified Professional (versions 4, 5, and 5.5), as well as being a Microsoft System Administrator/Engineer from 2003 to 2019.

Hi there,Good morning I am Talha. I have read you project details i saw you need help with Apache, Linux, System Admin, Ubuntu and SMTP I am pleased to present my proposal, highlighting our extensive experience and proven track record in delivering exceptional results. Our portfolio of success will showcase past projects that demonstrate our ability to meet and exceed client expectations. Glowing testimonials from satisfied clients will attest to our professionalism, dedication, and the quality of our work Please note that the initial bid is an estimate, and the final quote will be provided after a thorough discussion of the project requirements or upon reviewing any detailed documentation you can share. Could you please share any available detailed documentation? I'm also open to further discussions to explore specific aspects of the project. Thanks Regards. Talha Ramzan

With two decades worth of experience in system development and administration, I am confident that I have the skills and expertise necessary to address all of your server's email issues. I have deep knowledge in Linux-as well as Ubuntu, a significant part of your project requirements. Moreover, I am proficient with server configuration according to "the perfect server" guidelines which is a major component of your system and this boosts my ability to troubleshoot the root cause. In terms of your certificate issues, I can deftly handle the Let's Encrypt and SSL configurations for Dovecot and ISPConfig 3. Troubleshooting with Mailcow is also a niche of mine. The fact that I understand the importance of these certificates and their role in ensuring secure communication is an added advantage for me. Additionally, my approach favors minimal disruption to your live system- they aim for quick efficient solutions rather than complete rebuilds whenever possible. My goal is to deliver solutions that work seamlessly within the existing framework while meeting quality standards. No ongoing maintenance may be needed but

You are experiencing issues with email security, leading to rejections by major email providers and certificate warnings from Kaspersky. You need Zabbix installed for monitoring, want Mailcow implemented or manual email solutions provided, and SSL certificates correctly configured for Dovecot and ISPConfig 3. Proposed Solution Email Security Enhancement: Diagnose and resolve issues causing the rejection by Google and Microsoft. Implement SPF, DKIM, and DMARC to enhance email delivery. Address the Kaspersky certificate warning to eliminate security alerts. SSL Certificate Configuration: Configure Let's Encrypt certificates for Dovecot and ISPConfig 3 to ensure full SSL functionality.

Hello there! I can assist you with resolving the email rejection and SSL issues on your server, ensuring that your emails are securely delivered and eliminating certificate warnings. I’ll configure Let’s Encrypt for Dovecot and ISPConfig 3, and optimize your server settings to improve email deliverability. With extensive experience managing similar server environments and a strong background in mail server configuration and security, I can help get your system running smoothly. Let’s chat to discuss the specifics and ensure your setup meets your needs. Kind Regards, Arbaz A.

Hi may i can help you i have solid skills in Linux administration and also networking services like e-mail, database, web server and plus. Any doubt please contact me.

I am a highly skilled and experienced full stack developer with over 7 years of expertise in delivering innovative and customized solutions across various fields. My expertise spans across a wide range of technologies and skills, including System Admin, Linux, Ubuntu, SMTP and Apache, which enable me to tackle complex challenges and deliver robust, scalable, and efficient solutions. I am available to start immediately and am excited about the opportunity to contribute to your project's success. Thank you for considering my proposal. Best regards, Afaq Ali

Hello Harveyhase68, I have extensive experience in Linux system administration and web server setups, making me the perfect fit for your project. I can troubleshoot and resolve the issues with your SMTP, DNS, DKIM, and SPF configurations to ensure secure email delivery. Additionally, I am proficient in installing Zabbix and configuring Let's Encrypt certificates for Dovecot and ISPConfig 3 for enhanced SSL functionality. I understand the critical nature of your live system hosting 18 websites, and I am committed to efficiently resolving these issues within the specified timeframe. With my expertise in system administration and server optimization, I can provide reliable solutions for your email delivery and SSL certificate concerns. I am eager to discuss the details further and collaborate on improving your server's performance

To proceed with the manual configuration of the server and resolve the email issues, I will require SSH access credentials with the necessary privileges. I anticipate completing the configuration within 3 to 4 days. Thank you for considering this proposal. I look forward to your prompt response.

Hi, I am Djordje. I am so excited about the possibility of working together! As an experienced freelancer, I bring a commitment to quality, attention to detail, and a dedication to delivering results that exceed expectations. I believe in open communication, efficient workflows, and always going the extra mile to ensure client satisfaction. What sets me apart is my strong work ethic and a genuine passion for creating solutions that make a difference. I approach every project with fresh enthusiasm and tailor my approach to meet each client’s unique needs, ensuring a smooth and successful experience from start to finish. I’m here to make this project a success and look forward to the chance to work with you. Let’s create something exceptional! Best. Djordje

Hello I’ve carefully checked your requirements and really interested in Ubuntu Linux Postfix SMTP, DNS, DKIM, SPF troubleshooting and reinstall some certificates I have rich experienced in Linux, Apache, System Admin, SMTP and Ubuntu. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Sincerely, Eduardo