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Why e-mails from your domain land in spam, and how to fix it. We explain SPF, DKIM, DMARC and MX records in plain words, with example DNS entries. Articles show common mistakes such as too many SPF lookups, missing DKIM selectors or a DMARC policy that is never enforced. Each guide ends with the exact records to add or change. We also cover how to protect your domain from people sending e-mail in your name. Good e-mail authentication makes invoices, offers and password resets reach the inbox.
7 ต.ค. 2026 · อ่าน 8 นาทีWhy Gmail Shows “via” Next to Your Sender Name and How to Fix It
Gmail adds "via" and another domain next to your name when the sending service does not sign mail for your domain. Learn why it…
4 ต.ค. 2026 · อ่าน 8 นาทีDKIM Selectors Explained: How to Find Yours and Use Several
A DKIM selector tells receivers where to find your public key. Learn how to find the selector you use, run several senders and rotate…
1 ต.ค. 2026 · อ่าน 7 นาทีPostmaster and Abuse Mailboxes: Why Every Domain Needs Them
Postmaster, abuse and other role addresses let mail servers and people report problems with your domain. Learn which ones you need and how to…
1 ต.ค. 2026 · อ่าน 7 นาทีDMARC Failure Reports (ruf): What They Show and Their Limits
DMARC failure reports send details of individual messages that fail checks. Learn what ruf and fo do, why few providers send them, and privacy…
1 ต.ค. 2026 · อ่าน 7 นาทีCatch-All Email Addresses: Pros, Cons and the Spam Problem
A catch-all mailbox accepts mail sent to any address at your domain. See the benefits, the spam and security costs, and the safer alternatives…
1 ต.ค. 2026 · อ่าน 8 นาทีNo-Reply Email Addresses: Why They Hurt Deliverability
No-reply addresses frustrate customers and waste useful engagement signals. See when they cause harm, what to use instead, and how to route replies sensibly.
1 ต.ค. 2026 · อ่าน 8 นาทีSMTP Ports 25, 587 and 465: Which One Should You Use?
Port 25, 587 or 465? Learn what each SMTP port is for, which to use for your website or mail app, and how to…
30 ก.ย. 2026 · อ่าน 8 นาทีGreylisting Explained: Why Some Emails Arrive Late
Greylisting makes a mail server refuse the first message from an unknown sender until it retries. Learn how it works, why it delays email…
30 ก.ย. 2026 · อ่าน 7 นาทีEmail Sending Limits: Why Your Messages Get Throttled
Sending limits and throttling delay or block email when you send too much, too fast. Learn the limits that apply, how to read deferrals…
30 ก.ย. 2026 · อ่าน 8 นาทีSpam Trigger Words: What Really Gets an Email Filtered
Lists of spam trigger words are mostly a myth. Learn what modern spam filters actually weigh, which content habits still hurt and what to…
30 ก.ย. 2026 · อ่าน 8 นาทีFrom Name and Address: Email Sender Details That Build Trust
The From name, From address and Reply-To decide whether people trust and open your email. Learn how to choose them, avoid no-reply and keep…
30 ก.ย. 2026 · อ่าน 8 นาทีWhy Your Emails Land in the Gmail Promotions Tab
The Gmail Promotions tab is not spam, but it changes how people see your mail. Learn why messages are sorted there and what you…