Deliverability

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...

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...

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...

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...

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...

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...

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...

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...

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...

Remember relay races in school? Just as runners pass along a baton, an SMTP relay passes along an email from one server to another. Sinch Mailgun’s free SMTP relay...