... Been wrestling with deliverability lately. Warmup, SPF/DKIM/DMARC, dedicated IPs vs

... video conferencing inside the inbox. We're relaunching on Product Hunt soon with a lot of new features, and before we do, I wanted to open the floor. We've spent the last year deep in email infrastructure SPF, DKIM, DMARC, bounce handling, deliverability tuning, bulk sending, cold outreach sequences, white-label hosting, IMAP/SMTP, the works. If you have questions about any of it, ask below. Happy to go as deep as needed. Cold email deliverability and domain health ... ... vs

... that analyze thousands of signals engagement history, sender reputation, authentication alignment, complaint rates. In February 2024 this got a lot more concrete. Google and Yahoo rolled out new requirements for senders pushing more than 5,000 emails per day: SPF, DKIM, and DMARC became mandatory, one-click unsubscribe was required, and spam complaint rates had to stay below 0.10% in Postmaster Tools. Cross 0.30% and your mail gets rejected outright. From November 2025, Gmail tightened enforcement further. That's what ... ... your emails? I recently audited an EdTech company in Los Angeles. They send regular informational emails to educators across the US. Nothing promotional. Purely informational. They've been in business for almost two decades. They did everything right: SPF