Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): Newest
Operating system and version (eg, Ubuntu 20.04): Docker AIO
Apache or nginx version (eg, Apache 2.4.25): Docker AIO
PHP version (eg, 7.4): Docker AIO
The issue you are facing:
Sending mails not working:
A problem occurred while sending the email. Please revise your settings. (Error: Email could not be sent. Check your mail server log)
‘mail_from_address’ => ‘admin’,
‘mail_sendmailmode’ => ‘smtp’,
‘mail_domain’ => ‘XXX.ovh’,
‘mail_smtpauth’ => 1,
‘mail_smtpauthtype’ => ‘LOGIN’,
‘mail_smtphost’ => ‘XXXt’,
‘mail_smtpport’ => ‘465’,
‘mail_smtpname’ => ‘admin@XXX.ovh’,
‘mail_smtppassword’ => ‘Password’,
‘mail_smtpsecure’ => ‘ssl’,
Is this the first time you’ve seen this error? (Y/N):
Steps to replicate it:
The output of your Nextcloud log in Admin > Logging:
` 3 seconds","userAgent":"--","version":"27.1.3.2","data":{"app":"cron"}}
{"reqId":"uMSE13ud2YSZkbqdBA3s","level":0,"time":"2023-11-11T16:24:40+00:00","remoteAddr":"195.60.216.10","user":"admin","app":"no app in context","method":"POST","url":"/settings/admin/mailtest","message":"Email transport \"Symfony\\Component\\Mailer\\Transport\\Smtp\\SmtpTransport\" starting","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36","version":"27.1.3.2","data":[]}
{"reqId":"uMSE13ud2YSZkbqdBA3s","level":0,"time":"2023-11-11T16:24:50+00:00","remoteAddr":"195.60.216.10","user":"admin","app":"core","method":"POST","url":"/settings/admin/mailtest","message":"Sending mail to \"Array\n(\n [XXXX@gmail.com] => admin\n)\n\" with subject \"Email setting test\" failed","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36","version":"27.1.3.2","exception":{"Exception":"Symfony\\Component\\Mailer\\Exception\\TransportException","Message":"Connection could not be established with host \"ssl://mail47.mydevil.net:465\": stream_socket_client(): Unable to connect to ssl://mail47.mydevil.net:465 (Operation timed out)","Code":0,"Trace":[{"function":"Symfony\\Component\\Mailer\\Transport\\Smtp\\Stream\\{closure}","class":"Symfony\\Component\\Mailer\\Transport\\Smtp\\Stream\\SocketStream","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/symfony/mailer/Transport/Smtp/Stream/SocketStream.php","line":157,"function":"stream_socket_client","args":["ssl://mail47.mydevil.net:465",0,"",10,4,null]},{"file":"/var/www/html/3rdparty/symfony/mailer/Transport/Smtp/SmtpTransport.php","line":251,"function":"initialize","class":"Symfony\\Component\\Mailer\\Transport\\Smtp\\Stream\\SocketStream","type":"->","args":[]},{"file":"/var/www/html/3rdparty/symfony/mailer/Transport/Smtp/SmtpTransport.php","line":194,"function":"start","class":"Symfony\\Component\\Mailer\\Transport\\Smtp\\SmtpTransport","type":"->","args":[]},{"file":"/var/www/html/3rdparty/symfony/mailer/Transport/AbstractTransport.php","line":72,"function":"doSend","class":"Symfony\\Component\\Mailer\\Transport\\Smtp\\SmtpTransport","type":"->","args":[["Symfony\\Component\\Mailer\\SentMessage"]]},{"file":"/var/www/html/3rdparty/symfony/mailer/Transport/Smtp/SmtpTransport.php","line":136,"function":"send","class":"Symfony\\Component\\Mailer\\Transport\\AbstractTransport","type":"->","args":[["Symfony\\Component\\Mailer\\SentMessage"],["Symfony\\Component\\Mailer\\DelayedEnvelope"]]},{"file":"/var/www/html/3rdparty/symfony/mailer/Mailer.php","line":45,"function":"send","class":"Symfony\\Component\\Mailer\\Transport\\Smtp\\SmtpTransport","type":"->","args":[["Symfony\\Component\\Mime\\Email"],null]},{"file":"/var/www/html/lib/private/Mail/Mailer.php","line":216,"function":"send","class":"Symfony\\Component\\Mailer\\Mailer","type":"->","args":[["Symfony\\Component\\Mime\\Email"]]},{"file":"/var/www/html/apps/settings/lib/Controller/MailSettingsController.php","line":168,"function":"send","class":"OC\\Mail\\Mailer","type":"->","args":[["OC\\Mail\\Message"]]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":230,"function":"sendTestMail","class":"OCA\\Settings\\Controller\\MailSettingsController","type":"->","args":[]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":137,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[["OCA\\Settings\\Controller\\MailSettingsController"],"sendTestMail"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":183,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[["OCA\\Settings\\Controller\\MailSettingsController"],"sendTestMail"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":315,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Settings\\Controller\\MailSettingsController","sendTestMail",["OC\\AppFramework\\DependencyInjection\\DIContainer"],["settings.MailSettings.sendTestMail"]]},{"file":"/var/www/html/lib/base.php","line":1068,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/settings/admin/mailtest"]},{"file":"/var/www/html/index.php","line":36,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/3rdparty/symfony/mailer/Transport/Smtp/Stream/SocketStream.php","Line":154,"message":"Sending mail to \"Array\n(\n [maciejpawlaczyk3@gmail.com] => admin\n)\n\" with subject \"Email setting test\" failed","exception":{},"CustomMessage":"Sending mail to \"Array\n(\n [XXX@gmail.com] => admin\n)\n\" with subject \"Email setting test\" failed"}}
`
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The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
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The output of your Apache/nginx/system log in /var/log/____:
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Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
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