Email guides
Plain answers to the questions every sender runs into.
Authentication and DNS
SPF explained
What SPF is, how to publish a record correctly, what it does not protect against, and the mistakes that silently break it.
DKIM explained
How DKIM signing works, what a selector is, why it survives forwarding when SPF does not, and what breaks a signature.
DMARC explained
What alignment means, how to choose a policy, and how to reach p=reject without blocking your own mail.
Which DNS records a sending domain needs
The complete list of records for a sending domain, which are required, which are optional, and where each one goes.
Deliverability
Why your emails go to spam
The real reasons transactional mail lands in the spam folder, in the order worth checking, and which popular explanations are myths.
Bounces: hard, soft, and what to do about them
The difference between a hard and a soft bounce, what a healthy bounce rate looks like, and why suppression is not optional.
Gmail and Yahoo sender requirements
The bulk sender rules introduced in 2024, who they apply to, and what they mean for transactional senders.
Sending practice
Transactional vs marketing email
A test that tells the two apart, the gray areas that trip people up, and why Mailverick only carries one of them.
One-click unsubscribe and List-Unsubscribe
What the two headers do, when they are required, and why a link in the footer is not enough.
Shared vs dedicated IPs, and warmup
When a dedicated IP helps, when it hurts, and what warming one up actually involves.