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Compliance Event Dispatch: Auditable Email and SMS API Backoff Without Duplicate Sends
20+ hour, 13+ min ago (661+ words) Short answer: put compliance notices on a queue, assign one stable idempotency key per notice and channel, and record every attempt before any email or SMS API call. For a B2B SaaS compliance notice, choose the middle row. It adds one…...
Playwright email verification can pass for the wrong reason: six checks for a trustworthy test
20+ hour, 55+ min ago (575+ words) We deliberately made an email-verification test finish on the wrong account. The page said Email verified. Playwright passed. Then we added an assertion for which account had been verified. The same scenario failed. This was a controlled browser experiment with…...
I built an email scorer in one HTML file with zero dependencies. Here is every threshold and where it came from.
23+ hour, 44+ min ago (808+ words) I write about B2B sales for a living, which means I read a lot of cold emails and a lot of advice about cold emails. The advice is almost always unfalsifiable. "Keep it short." How short? "Be personal." Measured how? So…...
Testing email verification flows in Playwright without a mail server
1+ day, 9+ hour ago (682+ words) Most signup tests die at the same line. The form submits, the app renders "check your email", and the test has nowhere to go. You can assert the confirmation screen appeared, but everything after it — the code entry, the activated…...
Scaling transactional email: which provider fits at each growth stage (0 -> 100K+ emails/month)
1+ day, 10+ hour ago (1794+ words) Picking a transactional email provider feels like a five-minute decision — add an API key, send your first signup confirmation, move on. It stays a five-minute decision until you scale, at which point the plan you casually picked can turn into…...
Send Transactional Email from a Verified Domain with an API or SMTP
1+ day, 13+ hour ago (245+ words) Password resets, login codes, receipts, and alerts are easier to operate when application email has its own delivery path. Here are the setup decisions that matter before sending. Use a domain you control, then add the DNS records shown by…...
Custom Domain Onboarding: Show DNS Records, Copy or Write Them for Customers
2+ day, 5+ hour ago (674+ words) Short answer: show the exact SPF, DKIM, and DMARC records first, then let a customer explicitly authorize a write; this keeps onboarding honest when the DNS zone is customer-owned and prevents your intent from drifting away from what the internet…...
What I learned checking 65 client domains with RDAP instead of WHOIS
2+ day, 6+ hour ago (611+ words) I built a domain expiry monitor, and to test it against something other than my own domains I pointed it at the "our work" pages of 30 US web design agencies — the client sites they link to publicly — and checked every…...
Let the Link Carry the Tracking: UTM, One Table, and Knowing When You Actually Need Signatures
2+ day, 21+ hour ago (436+ words) The same offer goes into a Facebook group, a WhatsApp status, a Telegram channel and a classifieds site. The platform won't tell you which one works — but the link you publish can. Before the code, four things you should never…...
How I built an email-scanning SaaS audit engine with Next.js, Prisma and Neon
2+ day, 20+ hour ago (636+ words) When I audited my own SaaS subscriptions by hand, I found 7 tools I remembered paying for. A scan of my mailbox found 23. The gap between those two numbers is the entire reason SaaSClerk exists, and this post is about how…...