Sending Email doesnt work

[ataraxus]

Expected behavior

Email should be sent. I receive all of my emails, when i click on answer and then on send, the email should be sent.

Actual behavior

I get an error

I have this enabled in my config.php, but it didnt change anything (still horde exception)
'app.mail.transport' => 'php-mail'

OCA\Mail\Exception\ServiceException: Could not send message: mail() returned failure.
/var/www/html/custom_apps/mail/lib/Controller/AccountsController.php - line 345:

OCA\Mail\Service\MailTransmission->sendMessage(OCA\Mail\Mod ... {}, OCA\Mail\Mod ... {}, null, 192)

Horde_Mime_Exception: mail() returned failure.
/var/www/html/custom_apps/mail/vendor/pear-pear.horde.org/Horde_Mime/Horde/Mime/Mail.php - line 479:

Horde_Mime_Part->send("redacted <redacted>", Horde_Mime_Headers {}, Horde_Mail_T ... "})

/var/www/html/custom_apps/mail/lib/Service/MailTransmission.php - line 174:

Horde_Mime_Mail->send(Horde_Mail_T ... "}, false, false)

Sending mail failed: Could not send message: mail() returned failure.

{"reqId":"vfngDF3L2uwTTkPBNWkw","level":4,"time":"2020-07-11T13:18:30+00:00","remoteAddr":"87.79.237.48","user":"redacted","app":"mail","method":"POST","url":"/nextcloud/index.php/api/accounts/1/send","message":"Sending mail failed: Could not send message: mail() returned failure.","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36","version":"19.0.0.12"}
{"reqId":"vfngDF3L2uwTTkPBNWkw","level":3,"time":"2020-07-11T13:18:30+00:00","remoteAddr":"87.79.237.48","user":"redacted","app":"mail","method":"POST","url":"/nextcloud/index.php/api/accounts/1/send","message":{"Exception":"OCA\\Mail\\Exception\\ServiceException","Message":"Could not send message: mail() returned failure.","Code":0,"Trace":[{"file":"/var/www/html/custom_apps/mail/lib/Controller/AccountsController.php","line":345,"function":"sendMessage","class":"OCA\\Mail\\Service\\MailTransmission","type":"->","args":[{"__class__":"OCA\\Mail\\Model\\NewMessageData"},{"__class__":"OCA\\Mail\\Model\\RepliedMessageData"},null,192]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":170,"function":"send","class":"OCA\\Mail\\Controller\\AccountsController","type":"->","args":[1,"Re:redacted <redacted>","","",false,192,"SU5CT1g=",15807,[],null]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":100,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Mail\\Controller\\AccountsController"},"send"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":137,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Mail\\Controller\\AccountsController"},"send"]},{"file":"/var/www/html/lib/private/AppFramework/Routing/RouteActionHandler.php","line":47,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Mail\\Controller\\AccountsController","send",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"accountId":"1","_route":"mail.accounts.send"}]},{"function":"__invoke","class":"OC\\AppFramework\\Routing\\RouteActionHandler","type":"->","args":[{"accountId":"1","_route":"mail.accounts.send"}]},{"file":"/var/www/html/lib/private/Route/Router.php","line":297,"function":"call_user_func","args":[{"__class__":"OC\\AppFramework\\Routing\\RouteActionHandler"},{"accountId":"1","_route":"mail.accounts.send"}]},{"file":"/var/www/html/lib/base.php","line":1007,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/mail/api/accounts/1/send"]},{"file":"/var/www/html/index.php","line":37,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/custom_apps/mail/lib/Service/MailTransmission.php","Line":176,"Previous":{"Exception":"Horde_Mime_Exception","Message":"mail() returned failure.","Code":0,"Trace":[{"file":"/var/www/html/custom_apps/mail/vendor/pear-pear.horde.org/Horde_Mime/Horde/Mime/Mail.php","line":479,"function":"send","class":"Horde_Mime_Part","type":"->","args":["jug gler <redacted>",{"__class__":"Horde_Mime_Headers"},{"sep":"\n","__class__":"Horde_Mail_Transport_Mail"}]},{"file":"/var/www/html/custom_apps/mail/lib/Service/MailTransmission.php","line":174,"function":"send","class":"Horde_Mime_Mail","type":"->","args":[{"sep":"\n","__class__":"Horde_Mail_Transport_Mail"},false,false]},{"file":"/var/www/html/custom_apps/mail/lib/Controller/AccountsController.php","line":345,"function":"sendMessage","class":"OCA\\Mail\\Service\\MailTransmission","type":"->","args":[{"__class__":"OCA\\Mail\\Model\\NewMessageData"},{"__class__":"OCA\\Mail\\Model\\RepliedMessageData"},null,192]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":170,"function":"send","class":"OCA\\Mail\\Controller\\AccountsController","type":"->","args":[1,"redacted \u2013\n>   <redacted>","","",false,192,"SU5CT1g=",15807,[],null]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":100,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Mail\\Controller\\AccountsController"},"send"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":137,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Mail\\Controller\\AccountsController"},"send"]},{"file":"/var/www/html/lib/private/AppFramework/Routing/RouteActionHandler.php","line":47,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Mail\\Controller\\AccountsController","send",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"accountId":"1","_route":"mail.accounts.send"}]},{"function":"__invoke","class":"OC\\AppFramework\\Routing\\RouteActionHandler","type":"->","args":[{"accountId":"1","_route":"mail.accounts.send"}]},{"file":"/var/www/html/lib/private/Route/Router.php","line":297,"function":"call_user_func","args":[{"__class__":"OC\\AppFramework\\Routing\\RouteActionHandler"},{"accountId":"1","_route":"mail.accounts.send"}]},{"file":"/var/www/html/lib/base.php","line":1007,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/mail/api/accounts/1/send"]},{"file":"/var/www/html/index.php","line":37,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/custom_apps/mail/vendor/pear-pear.horde.org/Horde_Mime/Horde/Mime/Part.php","Line":1642,"Previous":{"Exception":"Horde_Mail_Exception","Message":"mail() returned failure.","Code":0,"Trace":[{"file":"/var/www/html/custom_apps/mail/vendor/pear-pear.horde.org/Horde_Mime/Horde/Mime/Part.php","line":1620,"function":"send","class":"Horde_Mail_Transport_Mail","type":"->","args":["redacted",{"From":"redacted <redacted>","Cc":"","References":"<.issue-2359..17@redacted>","In-Reply-To":"<.issue-2359..17@redacted>","Message-ID":"<20200711131830.Horde.8RHCXR2-GfQv8MFT-Pk42qs.redacted>","User-Agent":"Horde Application Framework 5","Date":"Sat, 11 Jul 2020 13:18:30 +0000","Content-Type":"text/plain; charset=utf-8","MIME-Version":"1.0","Content-Transfer-Encoding":"quoted-printable"},redacted},{"file":"/var/www/html/custom_apps/mail/vendor/pear-pear.horde.org/Horde_Mime/Horde/Mime/Mail.php","line":479,"function":"send","class":"Horde_Mime_Part","type":"->","args":["jug gler <redacted>",{"__class__":"Horde_Mime_Headers"},{"sep":"\n","__class__":"Horde_Mail_Transport_Mail"}]},{"file":"/var/www/html/custom_apps/mail/lib/Service/MailTransmission.php","line":174,"function":"send","class":"Horde_Mime_Mail","type":"->","args":[{"sep":"\n","__class__":"Horde_Mail_Transport_Mail"},false,false]},{"file":"/var/www/html/custom_apps/mail/lib/Controller/AccountsController.php","line":345,"function":"sendMessage","class":"OCA\\Mail\\Service\\MailTransmission","type":"->","args":[{"__class__":"OCA\\Mail\\Model\\NewMessageData"},{"__class__":"OCA\\Mail\\Model\\RepliedMessageData"},null,192]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":170,"function":"send","class":"OCA\\Mail\\Controller\\AccountsController","type":"->","args":[1 <redacted>","","",false,192,"SU5CT1g=",15807,[],null]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":100,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Mail\\Controller\\AccountsController"},"send"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":137,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Mail\\Controller\\AccountsController"},"send"]},{"file":"/var/www/html/lib/private/AppFramework/Routing/RouteActionHandler.php","line":47,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Mail\\Controller\\AccountsController","send",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"accountId":"1","_route":"mail.accounts.send"}]},{"function":"__invoke","class":"OC\\AppFramework\\Routing\\RouteActionHandler","type":"->","args":[{"accountId":"1","_route":"mail.accounts.send"}]},{"file":"/var/www/html/lib/private/Route/Router.php","line":297,"function":"call_user_func","args":[{"__class__":"OC\\AppFramework\\Routing\\RouteActionHandler"},{"accountId":"1","_route":"mail.accounts.send"}]},{"file":"/var/www/html/lib/base.php","line":1007,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/mail/api/accounts/1/send"]},{"file":"/var/www/html/index.php","line":37,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/custom_apps/mail/vendor/pear-pear.horde.org/Horde_Mail/Horde/Mail/Transport/Mail.php","Line":111}},"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36","version":"19.0.0.12"}

Mail app

Mail app version: 1.4.1

Mailserver or service: 1und1.de

Server configuration

Operating system: Ubuntu 18.04

Web server: official Docker Image of nextcloud 19

Database: mysql

PHP version: (e.g. 7.0)

Nextcloud Version: 19

Client configuration

Browser: latest firfox

Operating system: ubuntu 18.04

[ChristophWurst]

I have this enabled in my config.php, but it didnt change anything (still horde exception)

Did this setup ever work or are you using Nextcloud Mail for the very first time?

[ataraxus]

Hello @ChristophWurst first time NextcloudMail user. Longtime Nextcloud user...
Didnt work with or without this setting, i tried both

[ChristophWurst]

Are you sure php-mail works? Why do you use this and not SMTP?

[ataraxus]

It didnt work (sending) so I search ed for a Solution and Found this:
'app.mail.transport' => 'php-mail'
Which one should use if Service Provider is 1und1 which happens to be in our case

[ataraxus]

We Do use 1und1, since it didnt work out of the Box i followed this: https://github.com/nextcloud/mail/blob/master/doc/admin.md#use-php-mail-for-sending-mail

[ChristophWurst]

Got it. That is quite an old setting and I can't fully recall why this was/is necessary. Would you have the skills and time to debug if sending via php's sendmail is allowed on that setup? I don't currently have the time to help with this due to other priorities, sorry.

[ataraxus]

It didnt worked without, so i tried to follow these advices.... my first attempt was using it "vanilla" without any success.
Without any success means: email get displayed and are readable, but searching and answering emails is not possible.

I dont have any PHP skills, so I think i'm not capable to debug anything :( I hoped these logs will tell you something

[ataraxus]

upgraded to most recent version of nextcloud, sadly still not working. deleted account and created it again. only retreival of emails work, sending and search are still failing.

[ataraxus]

upgraded to nextcloud 20 and mail 1.5.0 deleted account and created a new one. still email sending breaks with:
Horde_Mime_Exception: mail() returned failure
custom_apps/mail/vendor/pear-pear.horde.org/Horde_Mime/Horde/Mime/Mail.php","line":479,

[ataraxus]

ok. now it works.
with the current nextcloud version 20 and mail 1.5.0 without 'app.mail.transport' => 'php-mail' it works with 1und1 1&1.

If I enable php-mail it doesn't work anymore with 1und1, maybe the hint from: https://github.com/nextcloud/mail/blob/master/doc/admin.md should be revised.

[ChristophWurst]

If I enable php-mail it doesn't work anymore with 1und1, maybe the hint from: https://github.com/nextcloud/mail/blob/master/doc/admin.md should be revised.

If you have an explanation for it I'm happy to accept PRs that update the docs with this knowledge :)

[ataraxus]

I dont have any explanation besides with nextcloud 18 and 19 I tried with and without this option. After upgrading to 20 I tried again with and without this option. Without enabling it it did work. I provided and read extensive debug logs (#3304) but i cant tell whats the issue.