Mailgun blog
Deliverability
Tips and strategies to ensure your email reaches its destination.
What is RFC 8058 and what does it have to do with one-click unsubscribe?
Bulk senders have had a lot of questions around what implementing a one-click unsubscribe process means since the requirement was announced by Gmail and Yahoo...
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How to implement DMARC – A step-by-step guide
Email spoofing is rampant across the internet. Fraudulent emails come in the form of scams, ransomware, and even stock-market manipulation. We see companies lose...
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SMTP: Exploring port 587
When it comes to email delivery, not all SMTP ports are created equal. While port 25 might be the oldest port in the book, and port 465 had its moment in the sun, it's port 587 that...
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Why is Gmail blocking my emails? How to prevent it
It's frustrating as an email sender when your messages don’t get through. Especially if you don't know why it's happening. In this article, we’ll dig into why Gmail may be blocking...
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Prevent your emails from going to spam: Plus 10 tips to fix it
Emails that land in the spam folder end up wasting all of that time and effort from your email marketing program – and they certainly won’t get any results. Sometimes, it can...
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What is SMTP and how does it work?
SMTP, though a pillar of email delivery, often gets lost in the jumble of tech terms and acronyms. But if you're ready to send impactful emails, this is one of those acronyms that...
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The basics of SPF records
SPF doesn’t refer to how long you can wait before you have to reapply your sunblock (seriously, go get some). Instead, the term “SPF” refers to a security measure that helps...
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What is inbox placement and how is it calculated?
Email deliverability sometimes feels like a mirage. Your messages go on a long journey from your mail server to your subscribers’ inboxes. But it’s the last part of that journey that...
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Email authentication: Your ID card for sending
Email authentication lets mailbox providers know that you’re a trusted sender – that you are who you say you are. As a Technical Account Manager at Mailgun, I’m constantly...
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Email hard bounces: The brick walls of failure
We’ve talked a lot about email bounces and email bounce rates as a whole in the past before, but we’ve really only ever dipped our toes into the different types of bounces...
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