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Messaging & Email
SMS/RCS, chat apps, email deliverability, and customer communications platforms.
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Your DMARC record might contain something that no longer exists
18+ hour, 22+ min ago (1037+ words) Most of us set up SPF, DKIM and DMARC once, watch the reports for a week or two, and then leave them alone. That's usually the right call. They aren't systems that need constant attention. This year is worth an…...
Your bounce handler is probably suppressing the wrong address
20+ hour, 21+ min ago (483+ words) Here is a bug I have now seen in four separate codebases, including one I wrote. Mail goes out. A bounce comes back. The handler parses the status code, sees a 5.x.x, concludes the address is bad, and adds the…...
Email deliverability in CI: what you can actually automate, and what you can't
20+ hour, 32+ min ago (442+ words) "Did that email arrive?" is two questions wearing one coat. One of them automates cleanly. The other does not automate at all, and most of the frustration around deliverability testing comes from not separating them. Automating the first is worth…...
One domain per job: why password resets should not share a reputation with outreach
20+ hour, 27+ min ago (578+ words) Most teams send every kind of mail from one domain, because that is the obvious thing to do and nothing appears to go wrong. Then a marketing send does badly, and two weeks later password reset emails start landing in…...
I sent 50 emails. 12 bounced despite SMTP 250 OK.
23+ hour, 8+ min ago (1795+ words) On March 14, my campaign hit a wall. I sent 50 cold outreach emails to hand-collected leads. Every single address had returned 250 OK during SMTP verification. Twelve of them bounced anyway. That's a 24% bounce rate from addresses that were supposed to be…...
I Sent 50 Emails And Got 12 Bounces. SMTP 250 Failed Me.
1+ day, 1+ hour ago (1434+ words) On July 15 I queued a campaign to fifty addresses I had already "verified" with a plain SMTP handshake. Every single one returned 250 OK. Three hours later, twelve of them bounced. That's a 24% failure rate in 38 minutes on addresses that looked…...
I sent 50 emails. 12 bounced despite SMTP 250 OK. Here's why.
1+ day, 2+ hour ago (1356+ words) On July 15 I queued a campaign to fifty addresses I had already "verified" with a plain SMTP handshake. Every single one returned 250 OK. Three hours later, twelve of them bounced. That's a 24% failure rate on addresses that looked perfectly healthy…...
How to Send Email With SMTPfast Two Ways, and Actually Watch Where It Went
1+ day, 3+ hour ago (610+ words) SMTPfast is a transactional email API built on top of Amazon SES. That's a deliberate choice: SES already has a decade of sender-reputation infrastructure behind it, and SMTPfast's job is to wrap that in an API that doesn't feel like…...
Stop Asking ChatGPT to Summarize Long Email Threads – Use This 3-Prompt Workflow Instead
1+ day, 5+ hour ago (1091+ words) A practical way to turn scattered replies, decisions, and unanswered questions into a clear action plan. A long email thread can look informative without actually being useful. There are comments from people who joined the conversation halfway through. And somewhere…...
I Built an AI Pipeline That Reads Support Emails and Drafts Replies (Here's What Actually Broke, and the Math on Whether It's Worth It)
1+ day, 10+ hour ago (436+ words) I run a one-person dev shop, and I keep hearing the same complaint from small business owners: answering customer support emails eats hours every day, especially when half the questions are variations of the same five things. Stack: Python 3.9, google-api-python-client,…...