Mumara Self-Hosted Email Infrastructure Engineer to Fix & Optimize Existing Install

We run an in-house email sending operation on a self-hosted Mumara install. The infrastructure is already built - VPS on Hostwinds, managed via FastPanel, Exim as the MTA, multiple sending nodes and domains, DNS on Cloudflare, IP warming through Warmy.io. It sent one broadcast successfully but now has errors for other broadcasts and is throttling and/or not sending. We don't know what is causing the errors We need someone who has actually operated self-hosted Mumara in production and can take over as our infrastructure person and resolve errors within Mumara with the nodes and servers and maintain max deliverability and sending capacity. Scope of work: Audit the current install — server config, Mumara node configuration, MTA setup, DNS records (SPF, DKIM, DMARC, rDNS/PTR), queue state, cron/worker health Diagnose why sends are failing and why the affected nodes stopped delivering Fix it and get all nodes sending cleanly and resolve all errors. This is NOT a marketing role. Introduce yourself, your experience doing this, and what your process would be for resolving the errors if we work together. Immediate hire for qualified person.