Mails not being sent

[Zwamdurkel]

I just installed roundcube 1.4.7 on ubuntu 20.04
Everything seems to have gone well. When I use the "Test SMTP config" and "Test IMAP config" I receive the confirmation email that everything works correctly and the https://domain/installer shows "OK"




However, when I try to send an email using the webmail interface, the box with "Sending Message..." never disappears and the message never gets sent.



These are my mail server settings:

$config['default_host'] = 'ssl://mail.gandi.net';
$config['default_port'] = 993;
$config['smtp_server'] = 'tls://mail.gandi.net';
* Using default port for smtp: 587

According to my mail provider these should be the right settings: https://docs.gandi.net/en/gandimail/standard_email_settings/

Please tell me why it's not working. I'll be happy to provide any information.

-Zwam

[JohnDoh]

check your browsers JS console and the roundcube error log for more information. you could also try enabling smtp_debug and looking at that log to see the communication with the smtp server.