Nextcloud Error - Sending Email To New Users - Swift_TransportException: could not be established with host

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Nextcloud version : 19.0.3
Operating system and version: LXC - Ubuntu18
PHP version: 7.4

Originally I tried to use the registration app to allow my users to create their own username and password but I kept getting server errors. Alternatively I found out that I can create the user and leave the password blank and place their email for them to create the password. Problem is that the email never comes through and when I try to click on “send a welcome email” I get an error.

I already set up the webclient, I can read my emails and send them just fine but for some reason I can’t send them a welcome email or create a password email to them. I also made sure the box, “send email to user” is checked within the settings. Below is the error log, sadly I dont know enough PHP to know the real issue, I did try to look into it but was getting overwhelmed. I’m trying to cut some cost on my small business and do things myself but there’s only so much I can understand, any help/advice would be appreciated!

Additional Notes: I am running NC in a Ubuntu 18 LXC within my QNAP NAS

Is this the first time you’ve seen this error? YES

The output of your Nextcloud log in Admin > Logging:

	Swift_TransportException: Connection could not be established with host :stream_socket_client(): unable to connect to (Connection refused)


    Swift_Transport_StreamBuffer->{closure}("*** sensiti ... *")

    /var/www/html/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php - line 272:


    /var/www/html/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php - line 58:


    /var/www/html/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php - line 143:


    /var/www/html/nextcloud/3rdparty/swiftmailer/swiftmailer/lib/classes/Swift/Mailer.php - line 65:


    /var/www/html/nextcloud/lib/private/Mail/Mailer.php - line 204:


    /var/www/html/nextcloud/apps/settings/lib/Mailer/NewUserMailHelper.php - line 174:


    /var/www/html/nextcloud/apps/provisioning_api/lib/Controller/UsersController.php - line 971:


    /var/www/html/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 170:


    /var/www/html/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 100:


    /var/www/html/nextcloud/lib/private/AppFramework/App.php - line 137:


    /var/www/html/nextcloud/lib/private/AppFramework/Routing/RouteActionHandler.php - line 47:




    /var/www/html/nextcloud/lib/private/Route/Router.php - line 297:


    /var/www/html/nextcloud/ocs/v1.php - line 88:


    /var/www/html/nextcloud/ocs/v2.php - line 24:

    require_once("/var/www/ht ... p")

Not sure if you need the config.php file to understand whats going.

Unfortunately you haven’t explained IN DETAIL how you’ve successfully set-up a webclient to send email. The error message “could not be established with host … unable to connect to 127.0.01:25 (Connection refused)” is absolutely clear. Connections on the loopback device are not accepted on port 25/tcp.

Please EXPLAIN IN DETAIL how your settings are looking like, what you’ve tried with which result.

Hi thank you for responding!

By webclient I am referring to the Email App that NC comes with; so I set that up by simply following the prompts. I entered my email and the password, once it completed loading it pulled up my emails. Upon further inspecting it seems that I can only see emails that are received and get notified if I get a new email but I can not send emails from the Email App.

I looked at the settings and realized that I did not full set up my Email Server in Settings>Basic Settings>Email Server. After setting this up I was able to send the welcoming emails to users. So my main objective is fixed but I’m confused as to why I cant send emails form the Email App; currently the send button appears to be clouded?

So please describe IN DETAIL what you’ve entered in the fields or provide a screenshot of the settings. Please also show any displayed error message and any related error from the Nextcloud log file.