By default Matomo (Piwik) will try to detect the current Hostname and use it in all emails sent. In some cases, the hostname cannot be detected and Matomo will use « ». You can specify your domain name to appear in From: email addresses by adding the following lines in your config/config.ini.php file:

defaultHostnameIfEmpty =

This will affect all emails sent from Matomo: Password reminder, Email reports. You can also change the default email address « From: » in PDF reports emails.

Previous FAQ: Matomo reports this error and fails: « Fatal error: Allowed memory size of X bytes exhausted (tried to allocate X bytes) ». What should I do?