Can´t send mails

Can´t send any mails from my raspberry pi, but another server with similary config can send mails.

My mail provider is

I checked the connection with a ping and I try to send mails with the ip from strato as the host.

This error i saw on the Web GUI: "Beim Senden der E-Mail ist ein Problem aufgetreten. Bitte überprüfe Deine Einstellungen. (Fehler: Connection could not be established with host [ #0])"

I see the log, but I don´t have an idea to fix it.
And I found it unormal that on one server the config function but not on another server.

Server configuration

Operating system:
Raspbian GNU/Linux 8 (jessie)
Web server:
Apache/2.4.10 (Raspbian)
mysql Ver 14.14 Distrib 5.5.60, for debian-linux-gnu (armv8l) using readline 6.3
PHP version:
PHP 5.6.33-0+deb8u1
ownCloud version: (see ownCloud admin page)
Updated from an older ownCloud or fresh install:
updated from an older oC version
Where did you install ownCloud from:
Signing status (ownCloud 9.0 and above):

Login as admin user into your ownCloud and access 
paste the results into and puth the link here.

The content of config/config.php:

    "system": {
        "instanceid": "ocoq89hwbqzx",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
        "datadirectory": "\/media\/owncloud\/data",
        "overwrite.cli.url": "https:\/\/xxx\/owncloud",
        "htaccess.RewriteBase": "\/owncloud",
        "dbtype": "mysql",
        "version": "",
        "dbname": "owncloud",
        "dbhost": "localhost",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "logtimezone": "Europe\/Berlin",
        "installed": true,
        "mail_smtpmode": "smtp",
        "default_language": "de",
        "trashbin_retention_obligation": "auto, 30",
        "memcache.local": "\\OC\\Memcache\\Redis",
        "filelocking.enabled": true,
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "localhost",
            "port": 6379,
            "timeout": 0
        "loglevel": 0,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "defaultapp": "files",
        "overwriteprotocol": "https",
        "updatechecker": false,
        "blacklisted_files": [
        "enable_avatars": true,
        "asset-pipeline.enabled": true,
        "activity_expire_days": 365,
        "quota_include_external_storage": false,
        "versions_retention_obligation": "auto, 7",
        "allow_user_to_change_display_name": false,
        "knowledgebaseenabled": false,
        "session_lifetime": 86400,
        "check_for_working_htaccess": true,
        "maintenance": false,
        "theme": "",
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpauth": 1,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "log_rotate_size": 104857600,
        "session_keepalive": true,
        "mail_smtpsecure": "ssl",
        "mail_smtpdebug": true

List of activated apps:

  - activity: 2.3.6
  - audioplayer: 2.3.0
  - calendar: 1.5.7
  - comments: 0.3.0
  - configreport: 0.1.1
  - contacts: 1.5.4
  - dav: 0.3.2
  - federatedfilesharing: 0.3.1
  - federation: 0.1.0
  - files: 1.5.1
  - files_antivirus: 0.12.0
  - files_external: 0.7.1
  - files_pdfviewer: 0.8.2
  - files_sharing: 0.10.1
  - files_texteditor: 2.2.1
  - files_trashbin: 0.9.1
  - files_versions: 1.3.0
  - files_videoplayer: 0.9.8
  - firstrunwizard: 1.1
  - gallery: 16.0.2
  - market: 0.2.4
  - notifications: 0.3.3
  - provisioning_api: 0.5.0
  - systemtags: 0.3.0
  - templateeditor: 0.3
  - updatenotification: 0.2.1
  - encryption
  - external
  - theme-example
  - user_external

Are you using external storage, if yes which one: local/smb/sftp/...
Are you using encryption: yes/no
Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...

Client configuration


Operating system:


Web server error log

Insert your webserver log here

ownCloud log (data/owncloud.log)

{"reqId":"PelCV9MqduMyRXejxGtU","level":0,"time":"2018-05-05T17:30:05+02:00","remoteAddr":"","user":"--","app":"cron","method":"--","url":"--","message":"Finished background job, the job took : 0 seconds, this job is an instance of class : OC\\Log\\Rotate with arguments : \/media\/owncloud\/data\/owncloud.log"}
{"reqId":"jMn0uElUUF0eZ2RJYz5L","level":0,"time":"2018-05-05T17:30:42+02:00","remoteAddr":"","user":"--","app":"webdav","method":"PROPFIND","url":"\/owncloud\/remote.php\/dav\/principals\/users\/myuser\/","message":"Exception: {\"Message\":\"HTTP\\\/1.1 401 No public access to this resource., No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured, No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured\",\"Exception\":\"Sabre\\\\DAV\\\\Exception\\\\NotAuthenticated\",\"Code\":0,\"Trace\":\"#0 [internal function]: Sabre\\\\DAV\\\\Auth\\\\Plugin->beforeMethod(Object(Sabre\\\\HTTP\\\\Request), Object(Sabre\\\\HTTP\\\\Response))\\n#1 \\\/var\\\/www\\\/html\\\/owncloud\\\/lib\\\/composer\\\/sabre\\\/event\\\/lib\\\/EventEmitterTrait.php(105): call_user_func_array(Array, Array)\\n#2 \\\/var\\\/www\\\/html\\\/owncloud\\\/lib\\\/composer\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Server.php(466): Sabre\\\\Event\\\\EventEmitter->emit('beforeMethod', Array)\\n#3 \\\/var\\\/www\\\/html\\\/owncloud\\\/lib\\\/composer\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Server.php(254): Sabre\\\\DAV\\\\Server->invokeMethod(Object(Sabre\\\\HTTP\\\\Request), Object(Sabre\\\\HTTP\\\\Response))\\n#4 \\\/var\\\/www\\\/html\\\/owncloud\\\/apps\\\/dav\\\/lib\\\/Server.php(278): Sabre\\\\DAV\\\\Server->exec()\\n#5 \\\/var\\\/www\\\/html\\\/owncloud\\\/apps\\\/dav\\\/appinfo\\\/v2\\\/remote.php(31): OCA\\\\DAV\\\\Server->exec()\\n#6 \\\/var\\\/www\\\/html\\\/owncloud\\\/remote.php(165): require_once('\\\/var\\\/www\\\/html\\\/o...')\\n#7 {main}\",\"File\":\"\\\/var\\\/www\\\/html\\\/owncloud\\\/lib\\\/composer\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Auth\\\/Plugin.php\",\"Line\":168,\"User\":false}"}

Insert your ownCloud log here

Browser log

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log 
c) ...

I think this looks like a networking / connectivity or access permission issue which could explain why the same config works on a different server.

Ok, thanks for the answer, i would think so too.

I think this is a local problem from my server, do you have any idea how can I test and fix it?

Unfortunately i'm not familiar with such kind of topics. :confused: But maybe there are some tutorials out there in the net which could give you some pointers for debugging this?

So now it works again. It was because the package "ca-certificates" was not installed.

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