Quform PHP stopped working. Please we need urgent help

[Jason2004]

Hi Ally,
We are very satisfied with Quform PHP. Thank you for developing it.
However, it suddenly stopped working.
Since the matter is urgent, we have contacted you by email, too.
This is what we get as an error:

Fatal error:  Uncaught PHPMailer\PHPMailer\Exception: Could not instantiate mail function. in /quform/vendor/phpmailer/phpmailer/src/PHPMailer.php:1907
Stack trace:
#0 
/quform/vendor/phpmailer/phpmailer/src/PHPMailer.php(1640): PHPMailer\PHPMailer\PHPMailer->mailSend()

We need your help.
Thank you for your support!

[Jason2004]

As Quform suddenly stopped working (without us changing the code), we contacted the hosting provider to investigate the problem. However, they referred us to you.

This is their response:

We recommend consulting with your web developer to review and address any script-related concerns. Additionally, please be aware that sending emails with alternative or empty email senders using IONOS servers is no longer supported. Have your web developer check the settings you have in the form.

https://www.ionos.com/help/email/troubleshooting-mail-basicmail-business/sending-emails-is-not-possible/
https://www.ionos.com/digitalguide/e-mail/technical-matters/phpmailer/

[Jason2004]

With the help of technical support, we found that the cause of the problem was the lack of SMTP authentication. It seems to be necessary now.
After the setup, Quform PHP worked for us again without any problems.

$config['smtp'] = array(
'host' => '',
'port' => 25,
'username' => '',
'password' => '',
'encryption' => ''

Is it recommended that we also set “encryption”? We have left it blank for now.

[Ally]

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