This guide details how to send emails from a website hosted by Infomaniak using the PHP mail() function, which is disabled by default.

Introduction

• Infomaniak strongly advises against using the PHP mail() function to send emails from your applications:
  • Emails will be considered "unauthenticated" and will therefore be subject to limits.
  • Their deliverability will be affected, which may harm your website.
• It is strongly recommended to use an authenticated SMTP sending methodfor sending emails from your applications; Infomaniak offers a dedicated service for this purpose.

Specify the sending address

To ensure that messages are sent correctly from your CMS/web application (and to avoid errors such as Could not instantiate mail function or sender mismatch), it is necessary to specify a valid address in the site settings on the Infomaniak Manager:

1. Click here to access the management of your site on the Infomaniak Manager (need help?).
2. Click directly on the name assigned to the site in question:
   
3. Click on Manage advanced settings:
   
4. From the General tab, enter an existing email address in the Sender Email field.
5. Click the blue Save button:
   

Re-enable the mail function

If you still want to use the PHP mail function, you will need to enable it for each of the websites on your Web Hosting account:

1. Click here to access your website management in the Infomaniak Manager (need help?).
2. Click directly on the name assigned to the website in question:
   
3. Click on Manage advanced settings:
   
4. Click on the PHP / Apache tab:
   
5. Enable the mail function:
   
6. Click the Save button at the bottom of the page to apply the changes.

PHP mail() examples…

… on WordPress

Configure the sending of the default contact form included with the Divi Builder:

1. Log in to the WordPress administration panel.
2. Go to the Divi editor of the page containing the contact form.
3. Click on the Settings icon ‍ to configure the Divi contact form:
   
4. Under EMAIL, enter the email address that will receive the form submissions and save:
   
5. By default, when a visitor uses the form to contact you, you will receive an email from mail@le-nom-de-votre-site, and if you reply, the recipient will automatically be the email address provided by the visitor when filling out the contact form.

… on Prestashop

Enter the advanced settings of Prestashop:

1. Specify the SMTP mode.
2. Enter localhost as the server.
3. Enter port 25.
4. Do not specify a username or password.
   

… on Joomla

Configure sending emails via PHPmail (not recommended) in Joomla:

1. Log in to the administration panel of your Joomla site.
2. Go to Configuration then Server.
3. Do NOT enter anything in the Website Email field:
   

Unfortunately, this prevents any sending tests via the corresponding button, but it will work if you configure a contact form on your website. Click Save once the field is left blank.

PHP mail() function reply address

When sending an email using the PHP mail() function, the return-path will be set as root@h2web3.infomaniak.ch, for example. However, the Reply-To: header present in your form's code allows you to specify a valid reply address.