Deliverability

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...

The moment Vesper Lynd slinks onto the screen in Casino Royale, you know exactly how this will all play out. Despite being a world-class spy, James Bond will fall hard for the...

The world of email is undergoing a significant shift. With Google and Yahoo recently increasing enforcement on DMARC, many organizations are having to implement DMARC...

Why do we need SMTP commands and what do they do? Well, we use SMTP (Simple Mail Transfer Protocol) commands to communicate with email servers. These commands are...

Both transactional and marketing email messages can rely on sending massive amounts of email all at once. But while bulk is better when buying toilet paper, that’s not always the...

It feels like a slap in the face. Or being dumped with the “it’s not you; it’s me” line. When an email subscriber marks one of your emails as spam, it feels like a betrayal. We were doing...