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6 articles tagged with SMTP.
The nine transactional email templates every product needs, with copy examples for password resets, receipts, failed payments, and shipping notices. Includes a transactional vs. marketing comparison table, sending-stream separation advice, variable-naming rules, and a pre-launch QA checklist.
Personal inboxes cap you at a few hundred emails a day, business suites at a few thousand. Here is what every provider tier actually allows, the four separate limits that stop sends, how to size the volume you really need, and a warmup ramp for scaling without tripping spam filters.
Reverse DNS maps your sending IP back to a hostname via a PTR record, and receiving servers check it before they decide whether to trust you. Here is how PTR records work, what forward-confirmed reverse DNS proves, who controls the record, how to verify it in two minutes, and the mistakes that quietly cost you inbox placement.
Email throttling is a temporary rate limit from receiving mail servers, not a rejection. Learn how to spot it in your SMTP logs, tell it apart from a block, read the deferral codes, and fix it with per-domain pacing, sane retries, and a proper warm-up schedule.
SMTP uses ports 25, 465, 587, and 2525. Here's what each port does, how they handle encryption, and which one to use when sending email.
SMTP is the internet standard for sending email. This beginner's guide explains what SMTP does, how a message travels, and how it differs from IMAP and POP3.