Mailgun blog

It's a common question that we receive here at Sinch Mailgun about SMTP port numbers. To ensure connectivity to our Simple Mail Transfer Protocol (SMTP) endpoint, Mailgun...

Whether you’re migrating from a legacy provider, other platform, or an in-house tool, one thing’s always true:

Styling HTML email templates is painful. Tables, inline CSS, unsupported CSS, desktop clients, web clients, mobile clients, and various device sizes are all things that influence...

If you thought you were finally getting a break from the sender requirement conversation after the industry shift brought by Google and Yahoo last year, not quite. Microsoft is stepping up to the plate. In its April 2, blog, Microsoft announced new...

It's a common question that we receive here at Sinch Mailgun about SMTP port numbers. To ensure connectivity to our Simple Mail Transfer Protocol (SMTP) endpoint, Mailgun...

Styling HTML email templates is painful. Tables, inline CSS, unsupported CSS, desktop clients, web clients, mobile clients, and various device sizes are all things that influence...

SMTP, or

, is the language servers use to talk to each other when sending emails. When something breaks during that conversation, the server returns a code to explain what happened. These

offer valuable insights, helping you figure out what went wrong and how to fix it...

Sending good email isn't just about sharp copy or eye-catching design. If mailbox providers don’t trust your domain, your messages won’t land where they should. Domain reputation plays a big role in getting to the inbox, and too many senders ignore it until there’s a problem...

Whether you’re migrating from a legacy provider, other platform, or an in-house tool, one thing’s always true:

If you thought you were finally getting a break from the sender requirement conversation after the industry shift brought by Google and Yahoo last year, not quite. Microsoft is stepping up to the plate. In its April 2, blog, Microsoft announced new...

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...

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...