DevOps Engineer: Minimalist Linux Mail Transport (MTA) & Netplan /28 Subnet Routing

@bindmission

Hello, I have 10 years of experience in DevOps engineering, specializing in Linux systems and network configurations. I propose to deploy a streamlined mail infrastructure on your bare-metal Linux environment with precision. My expertise includes OS optimization, seamless subnet routing, MTA deployment, and telemetry setup. I will adhere to your project governance and timeline, ensuring a successful deployment. Let's discuss how I can deliver exceptional results for your project. Regards, VishnuLal NB*

@DeveloperStation

Hi, I’ve spent 15 years as a Linux system administrator and DevOps engineer, working extensively with Ubuntu and CentOS. I’ve set up and managed multiple mail servers using Postfix, Zimbra, and other solutions, ensuring optimal security and deliverability. In addition to mail servers, I’ve worked with web servers, CI/CD pipelines, containerization, and infrastructure as code. I’m well-versed in tools like Docker, Kubernetes, Ansible, and Terraform, and I’ve led teams as a senior DevOps resource. I’m passionate about server hardening and have implemented advanced security measures such as fail2ban, SSL management, and web application firewalls. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit. I usually respond within 10 minutes. I’m eager to learn more about your exciting project. Best regards, Adil

@rupa37

With your complex project demanding a DevOps engineer who strikes an adept balance between agility and discipline, I'm eager to bring my extensive 15-year experience to the table. As an expert in system administration and DevOps, I specialize in optimizing and managing IT infrastructures to ensure utmost efficiency and scalability. I am well-versed in various distributions of Linux, including Ubuntu, which is instrumental to leveraging a minimalist mail transport on your newly provisioned bare-metal environment. My proficiency in network administration complements my knowledge of subnetting, which will be essential for configuring the routed, contiguous /28 IPv4 network block via Netplan according to your enterprise reverse DNS naming architecture. Additionally, my prior experience deploying highly optimized mail transport agents like Postfix paired with open-source applications over hardened LEMP stacks aligns perfectly with your project requirements.

@android2014213

Hi There, I can install and configure MTA in your bare metal linux server. I am interested to star this project ASAP. Please come on chat to discuss further. Thanks Ashish A.

@crystalhitesh

Hi, I’m Hitesh Goyal, a DevOps and Linux Server Administrator with 8+ years of experience in Ubuntu, Postfix, network engineering, mail infrastructure, and high-performance server deployments. I can deliver your complete 2-milestone deployment, including Ubuntu 22.04 optimization, BBR tuning, nofile configuration, /28 subnet mapping via Netplan, Postfix deployment with sender-dependent routing, LEMP stack setup, marketing automation integration, and real-time log telemetry streaming to external webhooks. I am comfortable working under NDA requirements and strict timelines, and I can ensure a clean, documented handoff with validation-ready infrastructure. Best regards, Hitesh Goyal

@ffulb

Binding Postfix to a /28 block with sender-dependent transport maps across 14 IPs is exactly what I built for an Australian software company last year — full VPS setup with KeyHelp, mail routing, and SSL on Ubuntu. I'd handle the Netplan static aliasing first to match your PTR records, then configure Postfix transport maps to rotate outbound connections across s1-s14. BBR and nofile limits are standard kernel tweaks I do on every bare-metal deploy. I'd also set up your log-shipping to pipe Postfix logs to your JSON webhook endpoint in real time. Need SSH access to the server to confirm the current network config and get started. Available now, more at ffulb.com.

@jack9603301

Hello, I have configured a complete mail server and provide configuration services such as Postfix + Dovecot. I run my own domain email service using similar configurations, and I've made mine more complex, including sender mapping and relay senders. This is to address the strong two-factor authentication (OAuth) issue with Microsoft Mail. I believe I can help you troubleshoot Linux issues and optimize configurations, including your email system. I'm also a Linux from Scratch user, meaning I've compiled the kernel multiple times. If you have any specific needs, I can offer reliable solutions. Thank you!

@cybexsoftadmin

Hi, I have 15+ years of experience with Linux, Postfix, email infrastructure, networking, automation, and high-volume server deployments. I can build the environment from a clean Ubuntu 22.04 installation, including: • Ubuntu hardening and kernel tuning (BBR, file descriptor optimization) • Netplan configuration for routed /28 subnet allocation and IP mapping • Postfix deployment with sender-dependent transport configuration • LEMP stack installation and optimization • DNS, rDNS/PTR validation, and mail infrastructure setup • Log collection, telemetry, and webhook integration • Documentation, testing, and handoff I work with milestone-based delivery, strict timelines, and NDA requirements. Before proceeding, please confirm: • Who manages DNS and rDNS records? • Which marketing automation platform will be deployed? • Is the /28 subnet already routed and available on the server? • What webhook format and monitoring requirements are expected? Estimated Timeline: 3–5 days for implementation, plus validation and monitoring. Available to start immediately. Rahul

@iimtpradeepdash

Hi! The detail about mapping your /28 subnet via Netplan and binding each IP for outbound mail (with strict reverse DNS) is the tricky part—this often fails on initial PTR sync or Postfix sender-dependent routing. I’ve set up similar mail infrastructure on optimized Ubuntu—Postfix on LEMP, sender-dependent transports, BBR kernel tuning, and log streaming via webhook for live monitoring. The risk is losing a clean 10/10 deliverability score if rDNS, SPF, or DKIM isn’t perfectly aligned with each IP; this needs careful sequencing. Quick check: are the enterprise rDNS entries already live, or will I provision and verify them as part of the setup? That shapes the DNS handoff timing. Happy to share a short design outline (free) of the base stack, including log telemetry setup. For more on my mail and subnet projects, see some portfolio examples at work.techindika.com. — Pradeep

@Appworldz

Hi, I've deployed and hardened high volume Linux mail infrastructures using Ubuntu, Postfix, Netplan, Nginx, PHP, telemetry pipelines, webhook integrations, and DNS reputation optimization. I'm comfortable with kernel tuning (BBR, limits), routed subnet configuration, sender dependent transport maps, log streaming, and structured milestone based delivery. One suggestion: no provider can realistically guarantee a perfect 10/10 validation score since reputation and DNS propagation involve external factors. Everything else is well within scope. I'd estimate $600 to $900 and 5 to 7 days plus the verification window. Sahanaj

@nintysix96

Treat the bid amount and timeline above as rough ballparks for now. We'll firm up the real numbers once we walk through the exact scope together. From what you've described, you need a clean, headless Postfix setup on a fresh Ubuntu 22.04 minimal install, with a full /28 routed via Netplan, each usable IP statically aliased to match your existing rDNS/PTR naming (s1 through s14). On top of that sits a LEMP-backed marketing automation layer, sender-dependent transport maps, and a log-shipping pipeline pushing real-time mail metrics to an external JSON webhook. The goal is a clean 10/10 on external validation tools by the end of the 9-day window. That's a tight, well-scoped sprint and we're comfortable with that kind of pressure. Here's how we'd approach it: - OS hardening: Ubuntu 22.04 minimal base, BBR enabled via sysctl, nofile limits pushed to 65535, unnecessary services stripped before anything else goes on. - Netplan /28 routing: contiguous block configured with static aliases mapped sequentially to match your rDNS naming architecture, verified against PTR records before moving to Milestone 2. - Postfix + LEMP: sender-dependent transport maps bound per-IP, Nginx + PHP-FPM + MySQL underneath the automation layer, configs kept headless and minimal. - Telemetry: log-shipping agent (Filebeat or a lightweight equivalent) parsing mail logs in real time and forwarding structured JSON payloads to your webhook endpoint. After a short scope call we'll put together a written proposal covering both milestones, deliverables, and a firm price. Want to jump on a quick call this week to walk through the rDNS layout and confirm the automation stack you're running? Best, 96 Studio

@smarketicsinc

A high-deliverability, hardened mail infrastructure that runs autonomously and provides real-time visibility into every outbound thread. I will execute your lean deployment with technical precision, specifically handling the Netplan /28 subnet mapping to align perfectly with your s1-s14 rDNS architecture and activating BBR congestion control for maximum throughput. I'll handle the entire process as a Done-For-You delivery: 1. OS Hardening: Minimal Ubuntu 22.04 installation with optimized file descriptors and kernel tuning. 2. Network Routing: Sequential static aliasing via Netplan and rDNS alignment. 3. MTA Layer: Postfix deployment with sender-dependent transport maps integrated into a hardened LEMP stack. 4. Telemetry: Real-time log-shipping configured to your JSON webhook endpoint. You will have the Core Base Environment Layer (Milestone 1) fully hardened and verified within the first 48 hours. I have a proven track record of deploying high-volume outbound mail systems and optimizing Linux kernel parameters for concurrent network threads. I am ready to execute the Mutual NDA and IP Assignment Agreement immediately to begin. Should we move to the workspace chat to finalize

@juan99lizano

You need a clean Postfix + LEMP stack on Ubuntu 22.04 with a /28 subnet aliased across s1–s14 PTR records, BBR enabled, and log-shipping to a JSON webhook — all within 7 days. I've done nearly identical work: configured Netplan static IP aliasing for multi-IP outbound Postfix with sender-dependent transport maps, tuned nofile limits and BBR on bare-metal Ubuntu, and wired Filebeat/rsyslog to webhook endpoints for real-time mail log streaming. I can deliver both milestones — base hardening + Netplan /28 config (M1), then Postfix transport maps, LEMP integration, and telemetry pipeline (M2) — well within your 7-day sprint, with documentation for each stage. I'm comfortable with the NDA/IP assignment requirement before credential handoff. What's the marketing automation layer — Mautic, Listmonk, or something else?

@rushikeshemp

Hello, I am interested in assisting with your Minimalist Linux Mail Transport (MTA) and Netplan subnet routing project. I have hands-on experience with Linux system administration, Ubuntu servers, networking, containerization, cloud platforms, and infrastructure deployment. My background includes working with RHCSA-level administration tasks, server hardening, network configuration, web server deployment, automation, and monitoring solutions. For this project, I can: • Perform Ubuntu 22.04 server hardening and system optimization. • Configure kernel tuning, BBR congestion control, and file descriptor limits. • Set up and manage Netplan-based network configurations and routed IP assignments. • Deploy and configure Postfix for outbound mail transport. • Install and harden a LEMP stack environment. • Configure logging, monitoring, and webhook-based telemetry integration. • Provide clear documentation and support throughout both project milestones. I understand the importance of reliability, security, and adherence to project timelines. I am comfortable working under NDA requirements and following structured milestone-based delivery processes. I would be happy to discuss your infrastructure requirements in more detail and provide a deployment plan before implementation begins. Thank you for your consideration. Best Regards, Rushikesh Harne DevOps & Linux Administrator

@deva266

Leveraging my extensive experience as a DevOps Engineer, I am confident in my ability to streamline your minimalist Linux mail transport infrastructure and optimize network mapping using Netplan. Over the past four years, I have built and automated scalable cloud infrastructures on platforms like AWS and Microsoft Azure, giving me a keen eye for stability, security, and performance. Pitching the deployment prowess of an outbound mail transport agent such as Postfix is something I'm very familiar with. My expertise extends to setting up sender-dependent default transportation maps and aligning them to meet defined enterprise reverse DNS (rDNS/PTR) naming architecture - a perfect fit for your mail routing needs. Lastly, telemetry & logging is an aspect of any system that should not be overlooked hence I assure you will not have to unnecessarily parse endless logs but rather giving you reliable metrics in real-time via centralized JSON webhook payload endpoint. Meeting project milestones within strict timelines and maintaining utmost confidentiality through necessary compliance are values I deeply uphold, as such it will be a pleasure to join your team. Let's harmonize our skills for a perfect 10/10 project completion!

@simma0501

Scope understanding: Your outbound mail system must be precise, secure, and high-performance, every IP, kernel tweak, and Postfix rule counts. Who we are: SCAIMLON LABS PVT. LTD. is a Bengaluru & Chennai-based Cloud MSP and certified Microsoft Azure, AWS, and Google Partner. Your Ask: You want a DevOps engineer to deploy a high-performance, secure, multi-IP outbound mail system on Ubuntu with optimized kernel, Postfix, containerized apps, real-time logging, monitoring, and strict 2-stage milestone validation. Deliverables: We will configure Ubuntu 22.04, kernel optimizations, Postfix with sender-dependent maps, LEMP stack, containerized apps via Docker/k3s, Nginx/Traefik with SSL, CI/CD blue-green deployments, Prometheus/Grafana/Loki logging, and deliver full monitoring, backups, and runbook documentation. Our Solution Approach: Ubuntu hardening, Postfix setup, Docker/k3s deployment, Nginx/Traefik SSL, Monitoring & runbook Relevant Experience: For Firepack, high-volume mail delivery and system reliability were critical. Platform: Ubuntu, Postfix, Docker/k3s, LEMP stack. Problem solved: kernel tuning, container orchestration, and SSL setup. Outcome: stable, fault-tolerant outbound mail system with monitoring and runbooks. Closing: If you need a high-performance, secure outbound mail system with monitoring and repeatable deployment, we are the right fit.

@toqeer74

The critical challenge lies in efficiently configuring a robust Postfix installation within a finely-tuned, minimal Linux environment while adhering to the precise subnet mapping requirements. I will implement kernel BBR and optimize file descriptors to support high-volume outbound threads, ensuring seamless mail delivery. Proper static IP aliasing aligned to your enterprise rDNS architecture will be executed using Netplan. The entire setup will be delivered within 7 days, followed by a 2-day verification period to confirm DNS propagation and log shipping configurations. Should we do a quick trial task so you can see the quality first-hand?

@techsty2014

Hello there, We will deploy your hardened Postfix MTA on Ubuntu 22.04 with Netplan subnet mapping, LEMP stack, and log telemetry to your webhook endpoint. For the /28 block, we will bind each usable IP sequentially and align PTR records so sender-dependent transport maps route cleanly across all 14 addresses. BBR and fd tuning will be handled in the base layer. A couple of quick things to confirm: 1) Which marketing automation platform are we deploying on the LEMP stack? 2) Is the /28 block already delegated with your provider for rDNS control? The number quoted here is a starting estimate. The exact cost and timeline will be confirmed after we go through the full scope together. Send me a message and we can go over the details. Best regards, Faizan

@hariom500

Hello, I can handle the complete Ubuntu 22.04 mail infrastructure deployment including server hardening, BBR optimization, Netplan subnet routing, Postfix outbound MTA setup, LEMP stack deployment, IP mapping, telemetry/log streaming, and final deliverability optimization. Experienced with Linux administration, DevOps workflows, mail server configuration, and high-volume outbound infrastructure. Comfortable working under NDA and milestone-based delivery structure.