Blog
SPF, DKIM and DMARC explained: email authentication guide
What each record does and how they work together to stop spoofing and land in the inbox.
Why your emails go to spam (and how to fix it)
The real reasons legitimate email gets filtered - and a practical checklist to fix each one.
How to warm up a new email domain the right way
A step-by-step warm-up schedule and the reputation signals to watch as you ramp volume.
What is a spam trap and how to avoid one
Pristine vs recycled traps, how lists collect them, and how to keep them out of yours.
Should you email role-based addresses like info@?
Why role addresses hurt deliverability, when to keep them, and how to handle them.
What is a good email bounce rate? (and how to lower yours) — Mailcheq
What counts as a good email bounce rate, how to calculate it correctly, and how list verification cuts bounces before they damage your sender reputation.
The email list hygiene checklist: clean your list the right way — Mailcheq
A practical email list hygiene checklist: what to remove, how often to clean, and which tools to use to keep bounces and spam complaints low.
Hard vs soft bounces: the difference, causes, and how to handle each — Mailcheq
Hard vs soft email bounces explained: what causes each, the SMTP codes behind them, and exactly how to handle both to protect your sender reputation.
How to reduce email spam complaints and protect sender reputation — Mailcheq
Lower your spam complaint rate with list hygiene, clear opt-outs, and proper SPF, DKIM and DMARC authentication. A practical B2B deliverability guide.
What is a catch-all email address? (and why it's risky to send to) — Mailcheq
Catch-all (accept-all) email domains explained: what they are, why they make verification uncertain, the risks of sending, and how a verifier flags them.
How SMTP RCPT validation works (without sending a test email)
The plain-English version of the technique every email-verification API uses under the hood — and the four edge cases that trip up naive implementations.
The disposable email problem in 2026: 652 providers, one growing list
How many disposable services exist, why the list keeps growing, what receiving infrastructure looks like, and which providers most often slip past consumer-grade filters.
Mailcheq vs Zerobounce vs NeverBounce: an honest 2026 comparison
We charge less. We are also smaller. Here is what that actually means for accuracy, latency, and the cost of a 50,000-address verification run.