Email Deliverability
Return Path Email Header Explained
Written by Julia G
When a recipient’s mail server rejects an inbound email, where does that message go? Does it just disappear or does it go back to the sender?
HTML Email Best Practices: Design, Code, and Deliverability
Written by Tanya Tarasenko
HTML emails can be powerful, visually engaging, interactive, and conversion-driven. But they can also break, land in spam, or render inconsistently if built carelessly. After years of working with email marketers, developers, and deliverability teams, I’ve seen one consistent pattern: beautiful design means nothing if the email doesn’t reach the inbox or render correctly.
AI Summaries in Email: Strategies for Gmail and Apple Mail
Written by Tanya Tarasenko
Over the past year, I’ve watched inbox experiences change more dramatically than at any point in the last decade. What used to be a competition between subject lines and preheaders has evolved into something more complex: AI-generated summaries that shape what subscribers see before (and even after) opening an email.
How to Send Mass Email in Outlook: A Practical Step-by-Step Guide
Written by Tanya Tarasenko
Email remains one of the most effective communication channels for announcements, newsletters, internal updates, and client outreach. Yet many people still struggle with how to send mass email in Outlook without creating spammy experiences, exposing recipient addresses, or damaging deliverability.
Does Gmail Unsubscribe Work? Implications for Marketers & Deliverability
Written by Tanya Tarasenko
What is Gmail’s automatic unsubscribe? Discover how to unsubscribe from emails Gmail shows, how the Gmail unsubscribe button works, and what it means for senders.
MX Backup Explained: Pros, Cons, and Best Practices
Written by Tanya Tarasenko
Email is one of the most business-critical communication channels. When incoming mail fails, the consequences can include lost leads, missed support requests, and damaged credibility. A backup MX strategy helps protect against these risks by ensuring emails are still accepted even when your primary mail server becomes unavailable.
Why Add an Unsubscribe Link to Cold Emails
Written by Julia G
Cold emails are electronic messages sent to a user with whom the sender doesn’t have prior relationship to initiate the communication. Unlike spam emails which are irrelevant and bulk sent, cold emails are targeted, relevant, and personalized.
Spam Sign-ups Explained: Protect Your Email List and Deliverability
Written by Tanya Tarasenko
Email marketing success starts with one thing: a healthy, high-quality email list. But what happens when that list becomes contaminated with fake subscribers, bots, or malicious sign-ups?
That’s where spam sign-ups come in, and they’re one of the most dangerous (and underestimated) threats to your deliverability, sender reputation, and campaign performance.
Email Throttling Explained: Why It Happens and How to Prevent It
Written by Tanya Tarasenko
Email deliverability challenges are not always caused by spam filters or technical errors. In many cases, messages fail to arrive on time simply because they are being slowed down by the receiving server. This process is known as email throttling, and it is one of the most common reasons email campaigns experience unexpected delivery delays.
How to Test Transactional Email Deliverability
Written by Julia G
A transactional email is an automated email message triggered by a specific user behaviour on a website or in an application. Examples of transactional emails include account registration confirmations, password resets, subscription confirmations, welcome emails, billing information updates, etc.