Matteo Baccan
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Solving email sending issues with Libero

2026-03-20

Solving email sending issues with Libero

For some time now, many Libero Mail users have been experiencing problems sending emails from third-party clients such as Outlook, Thunderbird or even custom applications. This is because Libero has introduced restrictions that, in fact, prevent the use of unauthorized SMTP servers.

The problem

In practice, if you try to send an email through a traditional email client, you may encounter an authentication or connection error to the SMTP server. This is not a malfunction of your client, but a specific choice by Libero to encourage the use of its webmail.

Solutions

Fortunately, there are solutions to get around this block.

Using Webmail

The easiest solution is to use Libero's webmail directly. This way there will be no problems sending, but you lose the convenience of using an email client you are used to.

Configuring the email client

Some more modern email clients allow you to configure your account to use Libero's servers correctly. However, this solution is not always applicable, especially if you use custom applications or need more flexibility.

On my site I have covered similar topics in the past that may be helpful:

Using html2pop3

For those who need a more robust and flexible solution, there is html2pop3. This service was created to solve problems of this type, allowing you to download mail from any provider (even those that do not offer POP3/IMAP access) and send it via a dedicated SMTP server.

With html2pop3 you can configure your email account in a few simple steps and continue using your favorite client without interruption. The service acts as a "bridge" between your client and Libero's servers, transparently managing all authentication and sending issues.

Conclusion

Problems with sending Libero mail can be frustrating, but as we have seen there are several solutions. If you are looking for a simple and immediate solution, webmail is the way to go. If, on the other hand, you want to continue using your favorite email client and have more control, html2pop3 is the ideal choice.