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. 
The Basics
- Nextcloud Server version (e.g., 29.x.x):
32.0.0
- Operating system and version (e.g., Ubuntu 24.04):
Ubuntu 24.04.3 LTS
- Web server and version (e.g, Apache 2.4.25):
Apache 2.4.58 (Ubuntu)
- Reverse proxy and version _(e.g. nginx 1.27.2)
replace me
- PHP version (e.g, 8.3):
8.3.6
- Is this the first time you’ve seen this error? (Yes / No):
Yes
- When did this problem seem to first start?
At least with this version, possibly before
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
Bare metal using Hetzner's image. I staggered upates to the latest version and fine-tuned as indicated by the warnings.
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
No
Summary of the issue you are facing:
I am trying to set up email notifications. I am using Postmark as my email sender. I have entered in all the correct SMTP information. When I go to send a test email, I get met with “AxiosError: Request failed with status code 400.” I have searched quite a bit for a solution to this problem (including here on the forums). For most people, the answer seems to be “you didn’t put in a user email address.” However, i have done that and still get the same result. Not sure what the next steps would be to troubleshoot.
Steps to replicate it (hint: details matter!):
-
As an admin, to “Basic Settings” and set up your Email Server.
-
Make sure you have an email account for your admin user.
-
Select “send test email.”
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.
Nothing shows up in the administrative settings>logging logs around the time that I attempt to trigger this action.
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.
N/A
Web server / Reverse Proxy
The output of your Apache/nginx/system log in /var/log/____:
Nothing appears to have shown up in this log, either.
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!):
{
"system": {
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"[IP Address]",
"[domain.tld]"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "mysql",
"version": "32.0.0.13",
"overwrite.cli.url": "https:\/\/[domain.tld]\/",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbport": "",
"dbtableprefix": "oc_",
"mysql.utf8mb4": true,
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"memcache.local": "\\OC\\Memcache\\APCu",
"loglevel": 2,
"debug": false,
"default_phone_region": "US",
"filelocking.enabled": true,
"memcache.locking": "\\OC\\Memcache\\Redis",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"port": 6379,
"timeout": 0,
"password": "***REMOVED SENSITIVE VALUE***"
},
"theme": "",
"twofactor_enforced": "false",
"twofactor_enforced_groups": [],
"twofactor_enforced_excluded_groups": [],
"instanceid": "***REMOVED SENSITIVE VALUE***",
"htaccess.RewriteBase": "\/",
"maintenance_window_start": 5,
"maintenance": false,
"app_install_overwrite": [
"tasks",
"news",
"end_to_end_encryption"
],
"config_preset": 1,
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_sendmailmode": "smtp",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "25",
"mail_smtptimeout": 30,
"mail_smtpauth": true,
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***"
}
}
Apps
The output of occ app:list (if possible).
Enabled:
- activity: 5.0.0-dev.0
- app_api: 32.0.0
- bruteforcesettings: 5.0.0-dev.0
- calendar: 6.0.0
- circles: 32.0.0
- cloud_federation_api: 1.16.0
- comments: 1.22.0
- contacts: 8.0.2
- contactsinteraction: 1.13.1
- dashboard: 7.12.0
- dav: 1.34.2
- end_to_end_encryption: 1.17.0
- federatedfilesharing: 1.22.0
- federation: 1.22.0
- files: 2.4.0
- files_downloadlimit: 5.0.0-dev.0
- files_pdfviewer: 5.0.0-dev.0
- files_reminders: 1.5.0
- files_sharing: 1.24.0
- files_trashbin: 1.22.0
- files_versions: 1.25.0
- firstrunwizard: 5.0.0-dev.0
- forms: 5.2.0
- logreader: 5.0.0-dev.0
- lookup_server_connector: 1.20.0
- news: 26.1.0
- nextcloud_announcements: 4.0.0-dev.0
- notes: 4.12.3
- notifications: 5.0.0-dev.0
- oauth2: 1.20.0
- password_policy: 4.0.0-dev.0
- photos: 5.0.0-dev.1
- privacy: 4.0.0-dev.0
- profile: 1.1.0
- provisioning_api: 1.22.0
- recognize: 10.0.4
- recommendations: 5.0.0-dev.0
- related_resources: 3.0.0-dev.0
- richdocuments: 9.0.0
- richdocumentscode: 25.4.504
- serverinfo: 4.0.0-dev.0
- settings: 1.15.1
- sharebymail: 1.22.0
- support: 4.0.0-dev.0
- survey_client: 4.0.0-dev.0
- systemtags: 1.22.0
- tasks: 0.16.1
- text: 6.0.0-dev.0
- theming: 2.7.0
- twofactor_backupcodes: 1.21.0
- twofactor_nextcloud_notification: 6.0.0-dev.0
- twofactor_totp: 14.0.0
- twofactor_webauthn: 2.4.0
- updatenotification: 1.22.0
- user_status: 1.12.0
- viewer: 5.0.0-dev.0
- weather_status: 1.12.0
- webhook_listeners: 1.3.0
- workflowengine: 2.14.0
Disabled: - admin_audit: 1.22.0
- encryption: 2.20.0
- files_external: 1.24.0
- suspicious_login: 10.0.0-dev.0
- user_ldap: 1.23.0
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.