... Claude writes the table-based HTML layout -> ChatGPT checks Outlook rendering quirks -> Perplexity verifies dark-mode CSS compatibility HTML

... while back I put together FreeSignature ( freesignature.site ), a free generator for HTMLemail signatures no account, no watermark, nothing to install. I made it because every tool I found either wanted $9/month or stamped its own logo into my signature. What surprised me is what people actually asked for. I expected requests about fonts, colours, layout. Almost none came. The two things people wrote about were: 1. "Will it still work in Outlook?" Outlook renders

... polished HTMLemail can still be clipped by Gmail or render differently in Outlook and dark mode. HtmlDrag

... Been wrestling with deliverability lately. Warmup, SPF/DKIM/DMARC, dedicated IPs vs shared, sending volume ramps. It's a deceptively deep rabbit hole. I'm curious what's actually working for people in 2026 versus