This guide details the sending of authenticated emails from a website hosted by Infomaniak using an SMTP configuration; the configuration of an authenticated SMTP server is presented for the main CMS.

Preamble

• Using authenticated SMTP for sending emails from your applications offers advantages in terms of security, reliability, error management, compatibility with third-party servers, and traceability compared to using unauthenticated PHP mail.

SMTP configuration examples…

Prerequisites

• Have an email service; you can use the Service Mail offered by Infomaniak or any other email service of your choice.

When you have an email address whose domain is attached to your website ( e-mail@domain-site.xyz for example) provide its details to use it for sending from the web server via SMTP:

… on WordPress

1. Log in to the WordPress admin panel.
2. Install an SMTP extension (WP Mail SMTP works).
3. Configure the extension, for example:
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From then on, an email sent from a contact form present on the site (default form Divi for example) it will be sent via an SMTP method.

To ensure this, simply check the headers of a message received this way, notably the line x-mailer which may mention, for example, WPMailSMTP/Mailer/smtp instead of PHPMailer.

... on Prestashop

1. Log in to the Prestashop admin panel.
2. Go to Advanced Parameters then Email.
3. Configure SMTP sending:
   

Then check (to avoid an error like Could not instantiate mail function or sender mismatch) that the address you have configured in these advanced settings matches the address that Prestashop uses for sending. To do this:

1. Log in to the Prestashop admin panel.
2. Go to Store Settings.
3. Click on Contact in the left sidebar.
4. On the Contacts tab, check that the email address mentioned is the same as the one configured previously.
5. Edit the email addresses if necessary:
   
6. Click on the Stores tab.
7. Check (and correct if necessary) that the email address mentioned is the same as the one configured previously:
   

... on Joomla

1. Log in to the Joomla administration panel.
2. Click on System in the left sidebar.
3. Click on Global Configuration:
   
4. Click on the Server tab.
5. Configure sending via the SMTP method: