Never used CKEditor but maybe this is a reason of your issue:
removePlugins: [
'MediaEmbedToolbar', // is not yet supported in CKEditor5 but throws console warning
'MediaEmbed', // this plugin only provides backend oembed support. Can be enabled by plugin that provides frontend support
'TodoList' // disable this by default as we do not allow input form elements in htmlawed
]
Thank you @rivervanrain. Somehow I missed this code, I had focused on vendors/ckeditor5 folder.
The problem was that the proposed script demands a user authentication but since the server does not require it, the whole script was unnecessary in that form. NO AUTHENTICATION IS REQUIRED FOR LOCAL EMAIL SUBMISSIONS.
In my opinion the example in the settings.php is just that an example of how to set the correct settings for your specific smtp server.
There are links to the documentation which should help you to figure out which settings are necessary for your case.
If you think this could be better documented please let us know how we can do that.
@Peter Jaramillo
https://elgg.org/discussion/view/3300132/laminasmailprotocolexceptionruntimeexception-error
https://elgg.org/discussion/view/3050485/emails-not-being-sent
https://elgg.org/discussion/view/3060652/php-can-send-email-but-elgg-site-cannot
https://elgg.org/discussion/view/2952483/php-mailer-its-not-working-reflecting-error
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