Blog
Why We Built DMARKOFF — The DMARC App That Works Like You Do
Written by Julia G
DMARC has become a core part of domain security and email deliverability. It helps protect brand reputation, prevents phishing and spoofing attacks, and ensures legitimate emails reach the inbox.
Does a Broken SPF Record Send Your Email to Spam? A Seed Test at 21 Providers
Written by Alex Markov
Your ESP says the message was delivered, your SPF checker says the record has a problem, and nothing tells you where the message actually ended up. A broken SPF record can get mail rejected, filed in spam, accepted and never delivered, or delivered to the inbox as if nothing were wrong. Which one you get depends largely on the receiving provider.
How to Improve Email Deliverability for High-Volume Campaigns
Written by Tanya Tarasenko
A campaign can show a high delivery rate while thousands of messages sit in spam. The receiving servers accepted the emails, but subscribers may never see them.
Microsoft SNDS Guide: IP Reputation and Outlook Deliverability
Written by Tanya Tarasenko
Your email platform says “delivered,” but Outlook subscribers keep finding your campaigns in Junk. Microsoft SNDS can help you investigate by showing traffic and filtering data for your sending IPs. The challenge is reading that data correctly: a green result is useful, but it does not prove that a campaign reached the inbox.
What Is a DNS TXT Record and Why It Matters for Email Deliverability
Written by Tanya Tarasenko
A DNS TXT record holds text that anyone can look up for your domain. For email senders, that text carries real weight: SPF, DKIM, and DMARC are all published as TXT records, and mailbox providers read them to decide whether a message from your domain is genuine. One wrong character in these records can send legitimate mail to spam.
Email Sign-Up Form: Best Practices & Examples
Written by Khrystyna Sliusar
Collecting email addresses through a sign-up form is only the first step in building an engaged email list. Some people might type their email addresses incorrectly, while others opt for a discount but aren’t really interested in hearing from you regularly. If your form doesn’t clearly explain what subscribers can expect, they might forget why they’re receiving your messages. This can confuse and frustrate both sides.
Images and Email Deliverability: When Visuals Send You to Spam
Written by Tanya Tarasenko
Images make an email feel like a brand rather than a plain text message. They also make plenty of senders nervous. Ask around, and you’ll hear that images send mail to spam, that you need a strict 60/40 text-to-image ratio, or that one large banner can sink a whole campaign.
DKIM Key Rotation: How to Do It Without Hurting Deliverability
Written by Tanya Tarasenko
Most teams set up DKIM once, see dkim=pass in a test message, and never think about it again. That works fine until a private key leaks, a former vendor still holds a copy, or a security audit asks when the key was last changed and nobody can answer.
How AI Spam Filters Decide Which Emails Reach the Inbox
Written by Tanya Tarasenko
Spam filters have changed a lot. They no longer look only for suspicious words, bad links, or known spam IPs. Gmail, Outlook, Yahoo, and other mailbox providers use machine learning together with sender reputation, authentication, sending behavior, message content, and recipient activity.
Transactional vs. Marketing Email: Should You Use One Dedicated IP or Two?
Written by Tanya Tarasenko
Transactional emails and marketing campaigns serve very different purposes, but they often run through the same email infrastructure. That raises an important deliverability question: can transactional and marketing emails share the same dedicated IP address?
Best Email MCP Servers for AI Agents: 8 Official Options Compared
Written by Tanya Tarasenko
An AI agent can draft an email without connecting to your email platform. Sending it, checking customer context, or testing where it lands requires access to the right tools.