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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...

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...

Every hero needs a sidekick they can count on to help save the day. A solid sidekick always has the hero’s back, and many times, they also have skills that complement their...

Your email health score is like a credit score, and takes into account all the different factors, features, and habits that contribute to your sender reputation. Our new feature is...

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...

For many developers, transactional emails have been the go-to method to send timely website and application notifications and alerts about abandoned cart reminders, order...

Every company is trying to achieve growth and be more recognizable and the protection of that journey can be incredibly challenging. There are times when everybody considers...

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...

Senders have just been hit with a change of requirements from Gmail and Yahoo, and now Apple Mail is sliding in with updates of its own to the inbox. Where will your messages...

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...