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What is a Port? If you are new to email and want to learn more about different port options and what port SMTP uses, then we need to start with the basics and learn what a port is.  It all starts with computers talking to one another…wait what? It’s true, computers love to talk…a lot…ok, […]

If you’re building a browser-based application that needs to use a third-party API, chances are that you have encountered the ‘access-control-allow-origin’ error message: Access to XMLHttpRequest at ‘https://api.example.com/’ from origin ‘https://customerexample.com’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. What Does The ‘Access-Control-Allow-Origin’ Error Message Mean? What does […]

Sending an email is a walk in the park, right? Add a recipient, write the body, and hit send…the email is sent to its destination.  In three painless steps, you’re able to send an email from one computer to another, anywhere around the globe, in a matter of seconds. In many ways, the process of […]

If you’re experiencing problems connecting to your SMTP server, then knowing how to test your SMTP relay connection will allow you to quickly diagnose the issue. By testing your SMTP connection, you can answer questions like: Is my SMTP server up and running? Why is my SMTP server not sending? Is something blocking communication with […]

You’re probably already aware that you can setup SMTP in Gmail. For most small senders with low email volume, Gmail’s free SMTP server is a quick and cheap way to start sending email. However, Gmail’s SMTP server comes with some limitations, and we’re talking about more than just sending limits. In this post, you’ll learn […]

“While the practice of email whitelisting has been used for decades, it has lost significant importance over the years.” So what is this coveted “email whitelist” that you’ve probably heard floating around the virtual halls of the email industry?  To understand email whitelisting and its current importance in the industry, let’s discuss a more common […]

What is IP Warming? You just got yourself a shiny new IP address and you’re ready to blast out 100,000 emails in your first day!  There is one problem…you can’t do that. Well, technically you can, but you definitely don’t want to. If you haven’t gotten the memo yet, there’s this thing called a sender […]

It shouldn’t come as a surprise that email is one of the most data-heavy forms of modern communication.  Something as simple as sending an email collects, transfers, and interprets around 100 KB of data. Multiply that by billions, and now you see why companies may have a difficult time manipulating this data for human consumption. […]

Many senders come to SocketLabs asking about transactional email and CAN-SPAM. Since you’re reading this, there’s a good chance that you’re wondering about CAN-SPAM rules for transactional emails. You might be surprised to learn that regarding transactional email, there aren’t any CAN-SPAM rules. Unlike marketing email, transactional emails are exempt from CAN-SPAM. In this post, […]

When it comes to transactional email and GDPR, many senders have questions about whether it is reasonable for transactional senders, such as SaaS applications and ecommerce stores, to deliver an email without consent. For example: Does a SaaS app like Shopify need consent to deliver a password reset to a customer? And what about an […]