Best practices
Deliverability guides and product notes — no filler.
Black Friday email deliverability: a dated checklist for BFCM 2026
A Black Friday email deliverability checklist for BFCM 2026: what to fix four weeks out, how to ramp volume, and the stop rules for the send days.
How to avoid email blacklists: the habits that keep you off blocklists
How to avoid email blacklists: the eight things that actually get senders listed, the habit that prevents each one, and how to monitor for listings.
Email list hygiene: the complete checklist, from signup to sunset
Email list hygiene as a checklist: what to check at capture, at import, before every send, and monthly to yearly, plus the rules for every verdict.
How to stop fake email signups: bots, throwaways and list bombing
Stop fake email signups with layered defenses: honeypots, rate limits, Turnstile, real-time verification and double opt-in, plus a block/warn/allow table.
Email sunset policy: when to stop emailing inactive subscribers
Write an email sunset policy that works: define inactive without trusting opens, set windows by send frequency, then win back or suppress.
How to safely email an old email list: a seven-step restart plan
Want to email an old email list? Check consent, verify every address, send a re-permission email to recent contacts first, then ramp up in small batches.
Hard bounce vs soft bounce: what each means and what to do
Hard bounce vs soft bounce: what each one means, how to read the SMTP code, and when to suppress an address, with a code table and a policy to adopt.
Email list health check: the metrics to review every month
Run a 20-minute monthly email list health check: the metrics to pull, healthy vs warning thresholds, and what each red flag tells you to fix.
Common email typos and how to catch them at signup
A reference of common email typos (gmial.com, hotmial.com, .con, a missing @) and how to catch them at signup with did-you-mean prompts, not auto-correct.
Fake leads from Facebook and LinkedIn lead ads: how to verify every email
Facebook lead ads fake leads waste sales time and hurt deliverability. Learn why lead-form emails go bad and how to verify every lead before your CRM.
Switching email service providers without losing deliverability: an ESP migration checklist
Switching email service providers? See what moves with you and what doesn't, plus a before, during and after ESP migration checklist.
Should you buy an email list? Why it backfires and what to do instead
Should you buy an email list? No. Purchased lists break consent laws and ESP terms, hit spam traps and get you blocklisted. Here's what to do instead.