Latest news, tutorials, and insights about email automation, AI agents, and developer tools.
Email-dependent tests often fail for reasons your application code cannot fully control. SMTP queues, provider retries, duplicate delivery, templa...
Jason Macdown
12 min read
Email is still one of the hardest dependencies to test reliably. Sign-up links arrive late, OTP messages get duplicated, shared mailboxes collide ...
Jason Macdown
13 min read
If you need to generate email temp addresses for signup tests, the safest approach is not to create random address strings and hope they work. A r...
Jason Macdown
15 min read
A temporary email address for verification should do one thing extremely well: receive the right verification email, at the right time, for the ri...
Jason Macdown
13 min read
Email is often the step that turns an otherwise stable automation suite into a flaky one. The product flow looks simple: create a user, send a ver...
Jason Macdown
16 min read
An instant email address is useful in CI only when it behaves like an API resource, not like a random mailbox someone checks manually. For signup ...
Jason Macdown
14 min read
AI agents do not need a mailbox in the human sense. They need a scoped, observable way to receive one or a few messages, convert those messages in...
Jason Macdown
12 min read
A random email address is useful in tests only if it can actually receive the email your app sends. user-${crypto.randomUUID()}@example.com may ...
Jason Macdown
14 min read
An AI agent should not “figure out” how email works at runtime. Email is too stateful, too asynchronous, and too easy to parse incorrectly. If the...
Jason Macdown
14 min read
Temporary inboxes make email automation deterministic, but only when their lifetime is explicit. If an inbox lives too long, stale messages can be...
Jason Macdown
14 min read
A missing email in CI is rarely a single problem. More often, the message was sent to the wrong recipient, routed to the wrong inbox, delivered af...
Jason Macdown
16 min read
Real user inboxes are a bad dependency for email verification flows. They are slow to automate, hard to isolate, risky for privacy, and almost imp...
Jason Macdown
13 min read
Using a temporary Gmail account for email-dependent tests feels convenient until the test suite becomes serious. A single mailbox is easy to creat...
Jason Macdown
13 min read
Inbound email is one of the most useful inputs an AI agent can receive. It can confirm a signup, unlock a magic-link flow, deliver an OTP, notify ...
Jason Macdown
14 min read
Custom domains make temporary inboxes feel less like a testing hack and more like infrastructure. They let you use addresses under a domain you co...
Jason Macdown
13 min read
High-volume agent runs make email a throughput problem. A single LLM agent can create a disposable inbox, wait for a verification message, extract...
Jason Macdown
14 min read
When email arrives through a webhook, the first question should not be whether the sender looks legitimate, whether the subject matches, or whethe...
Jason Macdown
14 min read
Email routing failures rarely look like routing failures at first. A signup test times out. A password reset flow reads yesterday’s OTP. An LLM ag...
Jason Macdown
14 min read
Email-related flakes usually look like timing problems. A test waits 20 seconds and still misses the OTP. A signup retry clicks an expired link. A...
Jason Macdown
15 min read
Disposable email looks simple at the address level: create an inbox, use the address, wait for the message, extract the code or link. In real auto...
Jason Macdown
12 min read