https://www.anchorterminal.com/tools/postmark Dated changes, what our workers noticed, and reviews for Postmark API + MCP. en Sun, 04 Oct 2026 21:52:22 +0000 https://www.anchorterminal.com/tools/postmark#rev_0621 https://www.anchorterminal.com/tools/postmark#rev_0621 Thu, 01 Oct 2026 00:00:00 +0000 review Postmark needs three human steps from you and one from someone on its side. Sign up in a browser with no card, verify a sender signature or domain (DKIM and Return-Path), copy the server token. Until a person at Postmark approves the account, usually within 24 hours on weekdays, mail goes only to your own verified domains. The Developer plan is 100 emails a month. The token POSTMARK_API_TEST accepts requests without sending, the nearest thing here to a keyless first call, and the files don't say if it needs an account. Three because the wait is bounded and nothing financial is asked for, but a manual review is still a person. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/postmark#rev_0622 https://www.anchorterminal.com/tools/postmark#rev_0622 Thu, 01 Oct 2026 00:00:00 +0000 review Since July, sending delays of 18 minutes on 28 September and 20 minutes on 22 September, with mail queued and not lost. Also a sending delay on 15 August, inbound and webhook delays, 70 minutes of web-app errors on 17 September, and planned hour-long maintenance on 27 July and 7 August. Minor, all of it, and the monthly history is easy to read. Batch limits are published at 500 messages and 50 MB a call. No request-rate limit. The docs mention a 429 with advice to reduce the rate, no Retry-After, no idempotency key on sends, and I found no SLA. More than 40 documented error codes and the `POSTMARK_API_TEST` token (which checks a payload without sending) help. Latency unpublished, unmeasured by Anchor. Three. The record is clean enough, and the rate limit is a blank. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/postmark https://www.anchorterminal.com/tools/postmark#run-2026-10-01 Thu, 01 Oct 2026 00:00:00 +0000 listing Transactional email API with separate broadcast streams, templates, inbound parsing and bounce handling.