Establishing company-prospect or company-client communication channels is one of the key tasks that every business must undertake if it wants to have a successful digital business. Currently there are a large number of channels that can be used to share information and messages with prospects; However, email is one of the most cost-effective and easy-to-use options.

If the data is analyzed more closely, an interesting panorama of the email service can be found. For example, According to Statista, approximately 306 billion emails were sent in 2020; a very high figure that demonstrates the need for companies to leverage this digital tool.

The impact of email is evident, but ¿How does this technology work within the structure of a business?

To understand how email and the marketing that is carried out through it work, it is important to know the concept of Simple Mail Transfer Protocol (SMTP) or for its translation into Spanish, Simplified Email Transfer Protocol.

This protocol is of great importance because If something fails within the process, errors can come out that in the end can cause damage or inconvenience to your customers.. So this article will go into more detail about this topic.

Definition of SMTP

It is the protocol that email servers use to send and receive emails, while email clients typically use SMTP only to send email messages to a mail server for delivery.

Creation of transactional campaigns on the SendPulse platform

In the first instance, understanding SMTP can be a bit complex terminology, but in simpler words, it can be said that SMTP is the steps that emails must follow from when they leave an origin server (known as outgoing) until they reaches an incoming server regardless of the email address one has. Through this protocol, emails can arrive from different servers.

SMTP Features

Among the most common functions that an SMTP can have are:

• eCommerce services: to automatically send receipts, payment confirmations or any transactional email from the purchasing process within the platform.

• Marketing automations: to connect a website with an email marketing system without the need for an API.

• Configure applications: so that application notifications are automatically sent through emails with reminders, payment notices, etc.

SMTP settings in SendPulse

Most common mistakes

There are two errors that are the most common that can occur:

Error 421: This error occurs when the connection was interrupted because the IP was not listed in the DNS list. The Domain Name System (DNS) or Domain Name System is a hierarchical naming system connected to IP networks such as the Internet.

In this bug, unacceptable emails have been sent from the IP address with unusual frequency; or there was a temporary system error; or the connection was interrupted due to a failure of the internet service or another eventuality.

For this reason, the solution is to check if the IP is present in the RBL database or other lists. However, the best thing to do is wait and connect another time.

Error 500:  This error occurs when the Simplified Mail Transfer Protocol command used was not recognized or is not supported by the server's protocol or implementation.

The solution for this error is simple: check the syntax of the last protocol command and try again. A second option would be to try to shorten the command since the error may have appeared due to the length of the command.

To solve this, it is recommended to check the syntax of the last SMTP command and try again or try to shorten the command since this error may arise if it is very long.