In the current digital context, the most used communication mode of communication is sending emails electronically. Whether private or professional messages, the SMTP offers a reliable distribution since it is he who is responsible for sending the mail to your recipients. It is therefore an indispensable protocol for sending emails. Let’s look closer what these letters mean and how does this key device work.

What is SMTP?

First, it is important to remember that all our online activities are governed by different protocols put in place, which will connect to the networks and perform different actions on the Internet. For sending emails, we talk about SMTP.

The SMTP, or Simple Mail Transfer Protocol, is a computer communication protocol used for sending and receiving letters on email servers. It serves as a relay, an intermediary between the sender and the recipient, hence the use of the term “SMTP Relais”. Thus, each email sent is submitted to the SMTP. It is he who will determine how mail passes from one server to one or more other(s).

Of course, the “classic” SMTP requires no installation or management, in the sense that it is already integrated into the networking of computers.

How does the SMTP work?

On one side, there is the sender, on the other the recipient. In the middle, the E-mail Provider (MTA for “Mail Transfer Agent”) of each of the two actors. This supplier may be the same or different.

The sender writes his email by finding his e-mail address and that of the supposed person to receive the message, as well as the subject and the content of the newsletter. The mail is sent and passes through the sender’s mail server. The SMTP will then search the recipient’s mail server on the Internet, then send the message to the same mail server.

Once the email is on the recipient’s server, it’s another protocol that comes into play. Indeed, it is the pop (Post Office Protocol) OR IMAP (Internet Message Access Protocol) that will allow the recipient to download the email that has been sent to him. Once the message is recovered, it is erased from the mail server.

Thus, the SMTP concerns the sending of the mail to the different mail servers, while the other two intervene in the reception of the message.

The SMTP protocol relies on TCP connections using the default port (25). For secure declination, it is the port 587 that is used.

What SMTP for a business?

Nowadays, email marketing is an indispensable in the marketing strategy of a company. Although “classic” (Gmail, Outlook, Yahoo, etc.) SMTPs are very convenient for individuals or mere mailings in business, they can quickly be outdated according to the mass of mail sent. For the emailing campaigns in particular, the best is to opt for a professional SMTP that will then allow to send automated emails by mass to an unlimited number of recipients.

Another element to consider: IP addresses associated with “classic” SMTP servers are not suitable for mass shipments because they are not monitored. To ensure the success of your email campaigns, it is better to opt for a professional SMTP that will allow you to enjoy optimal deliverability and enjoy a reliable reputation as a provider.

Finally, be aware that private SMTPs often make it possible to obtain a statistics report for sent mail, which can be extremely practical for measuring the results of the shipment campaign.