Blog
Guides, deep dives, and best practices on email deliverability and validation.
Role accounts: why you shouldn't send marketing emails to info@ addresses
Role accounts like info@, support@, and noreply@ are shared inboxes managed by teams, not individuals. Sending marketing emails to them increases unsubscribe rates, spam complaints, and list fatigue.
How to build a double opt-in flow that still converts
Double opt-in is the gold standard for list quality — but a clunky implementation kills conversions. We cover confirmation email design, timing, re-send logic, and how real-time validation at the initial form reduces drop-off.
How a marketing agency cleaned 1.4M contacts before a product launch
A digital marketing agency had a 1.4M-address list compiled over four years from multiple sources. With a major product launch two weeks away, they needed it validated and segmented fast.
MX records explained: what they are and what they mean for email deliverability
Mail exchanger records are the first thing any email validator checks. A missing or misconfigured MX record means the domain cannot receive email at all — no SMTP probe needed.
The real cost of a high bounce rate: penalties, blacklisting, and lost revenue
A 5% bounce rate sounds small until you see the compounding cost — ESP penalties, IP blocks, sender reputation damage, and the lost revenue from emails that never arrive. We ran the numbers.
Email validation vs. email verification: is there a difference?
The terms are often used interchangeably but they describe different things. Validation checks format and structure; verification confirms the mailbox actually exists. Most tools do both — here's what to look for.
How email warm-up works — and why a clean list makes it easier
Warming up a new sending domain means gradually increasing volume so ISPs build trust in your sender reputation. Starting with a validated list dramatically reduces the risk of early complaints tanking your score.