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So you want to set up email on a subdomain. Maybe you’re trying to route support@help.yourdomain.com to your helpdesk, or you want newsletters@mail.yourdomain.com to run through your ESP without torching your main domain’s reputation. Whatever the reason, you’ve landed on the right page. MX records for subdomains are one of those DNS topics that seem […]
Spam hasn’t gone anywhere. Keep coming back to it, as I hate cleaning up my INBOX and so do my clients! In fact, AI-generated spam has made the problem noticeably worse through 2025 and into 2026 — it’s more convincing, passes basic heuristic checks that would’ve flagged template spam instantly, and arrives in higher volumes. […]
AI-generated phishing campaigns, snowshoe spam, and compromised accounts blasting garbage have made 2026 a genuinely rough time for inboxes — and every production mail environment needs a solid filtering layer to survive it. In 2026, the best open source options all run in Docker. This guide covers every major open source anti-spam solution with a […]
So you want better conversion rates from your email campaigns? Great news – I am trying to summarize conversion strategies that don’t require a PhD in marketing, design tricks that actually matter, how to play nice with social media, when to hit send, and the mysterious image-to-text ratio that could be tanking your deliverability. More […]
The landscape of free S/MIME email certificates has collapsed dramatically since 2022, leaving only one viable provider amid industry-wide shifts toward paid services and stricter compliance requirements. This consolidation represents a fundamental change in email security accessibility, forcing individual users and small organizations to either accept significant security compromises or invest in paid alternatives. The […]
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Alexander Gräf
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