Please help us help you and fill where relevant:
Your LimeSurvey version:Version 5.6.11+230320
Own server or LimeSurvey hosting: Own Server
Survey theme/template:
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Previously in Limesurvey version 3 I would edit the PHPMailer.php file to add in the below lines. This would allow us to send email using our SMTP server, while not ideal this is what is required. How do I do the same thing in LimeSurvey version 5 ? 
verify_peer' => false
verify_peer_name' => false
allow_self_signed' => true

Thanks

This was it -
limesurvey/vendor/phpmailer/phpmailer/src/PHPMailer.php

public $SMTPOptions =
array(
'ssl' => array(
'verify_peer' => false,
'verify_peer_name' => false,
'allow_self_signed' => true
)
);

Don't update core if you can do (or use) plugin
gitlab.com/SondagesPro/coreAndTools/AllowSelfSignedSSLSmtp
 

Thanks. I attempted the plugin. I received the below.


×The plugin could not be installed or updated: Could not parse config.xml file.

Same directory + same file name

Explain what you do exactly …

Using version 5.x I'm uploading it as a zip file to the site and recieve that message. Thanks.

What namle is the zip file ?

You must rezip without -master

Got it. Working now. Thanks!