Support intro
When setting up the nextcloud mailclient it gives what ever I do mail errors.
config.php:
‘mail_from_address’ => ‘nextcloud’,
‘mail_smtpmode’ => ‘smtp’,
‘mail_sendmailmode’ => ‘smtp’,
‘mail_domain’ => ‘robkalmeijer.nl’,
‘mail_smtphost’ => ‘127.0.0.1’,
‘mail_smtpport’ => 25,
‘mail_smtpsecure’ => ‘’,
‘mail_send_plaintext_only’ => false,
The mailserver accepts unathenticated and none TLS at port 25. Roundcube webmailserver works fine with this setting.
Problem seems that nextcloud force STARTTLS even with the settings shown.
SMTP and HTTP are running on the same server. So HTTP-CMS clients are trusted.
Rob.
Sorry to hear you’re facing problems. 
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The Basics
- Nextcloud Server version (e.g., 29.x.x):
30.0.2
- Operating system and version (e.g., Ubuntu 24.04):
- Rocky Linux 9.5
- Web server and version (e.g, Apache 2.4.25):
- Apache/2.4.62 (Rocky Linux)
- PHP version (e.g, 8.3):
- 8.2.26
- Is this the first time you’ve seen this error? (Yes / No):
- No
- When did this problem seem to first start?
- From the first day since install
- Installation method (e.g. AIO, NCP, Bare Metal/Archive, etc.)
- tarball
- Are you using Cloudflare, mod_security, or similar? (Yes / No)
- No
Summary of the issue you are facing:
[…]
Steps to replicate it (hint: details matter!):
Log entries
Nextcloud
Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.
PASTE HERE
Web Browser
If the problem is related to the Web interface, open your browser inspector Console and Network tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.
PASTE
Web server / Reverse Proxy
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
Configuration
Nextcloud
The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):
See above
Apps
The output of occ app:list (if possible).
Enabled:
- activity: 3.0.0
- app_api: 4.0.0
- bruteforcesettings: 3.0.0
- calendar: 5.0.6
- circles: 30.0.0
- cloud_federation_api: 1.13.0
- comments: 1.20.1
- contacts: 6.1.1
- contactsinteraction: 1.11.0
- dashboard: 7.10.0
- dav: 1.31.1
- federatedfilesharing: 1.20.0
- federation: 1.20.0
- files: 2.2.0
- files_accesscontrol: 1.20.1
- files_downloadlimit: 3.0.0
- files_external: 1.22.0
- files_pdfviewer: 3.0.0
- files_reminders: 1.3.0
- files_sharing: 1.22.0
- files_trashbin: 1.20.1
- files_versions: 1.23.0
- firstrunwizard: 3.0.0
- groupfolders: 18.0.6
- logreader: 3.0.0
- lookup_server_connector: 1.18.0
- nextcloud_announcements: 2.0.0
- notifications: 3.0.0
- oauth2: 1.18.1
- password_policy: 2.0.0
- photos: 3.0.2
- privacy: 2.0.0
- provisioning_api: 1.20.0
- recommendations: 3.0.0
- related_resources: 1.5.0
- serverinfo: 2.0.0
- settings: 1.13.0
- sharebymail: 1.20.0
- support: 2.0.0
- survey_client: 2.0.0
- systemtags: 1.20.0
- text: 4.1.0
- theming: 2.5.0
- twofactor_backupcodes: 1.19.0
- updatenotification: 1.20.0
- user_status: 1.10.0
- viewer: 3.0.0
- webhook_listeners: 1.1.0-dev
- whiteboard: 1.0.4
- workflowengine: 2.12.0
Disabled: - admin_audit: 1.20.0
- encryption: 2.18.0
- files_rightclick: 0.15.1 (installed 1.6.0)
- suspicious_login: 8.0.0
- twofactor_nextcloud_notification: 4.0.0
- twofactor_totp: 12.0.0-dev
- user_ldap: 1.21.0
- weather_status: 1.10.0 (installed 1.6.0)
Tips for increasing the likelihood of a response
- Use the
preformatted textformatting option in the editor for all log entries and configuration output. - If screenshots are useful, feel free to include them.
- If possible, also include key error output in text form so it can be searched for.
- Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.
In maillog:
Dec 2 23:50:54 server5 postfix/smtpd[186947]: connect from localhost[127.0.0.1]
Dec 2 23:50:54 server5 opendmarc[14851]: ignoring connection from localhost
Dec 2 23:50:54 server5 postfix/smtpd[186947]: lost connection after STARTTLS from localhost[127.0.0.1]
Dec 2 23:50:54 server5 postfix/smtpd[186947]: disconnect from localhost[127.0.0.1] ehlo=1 starttls=1 commands=2
Starttls is used even without my settings.