Could not load E-Mail

[davidpr78]

Steps to reproduce

Steps to reproduce

1. Open Mail App
2. Open E-Mail
3. Send E-Mail

Expected behavior

Expected behaviour

E-Mails are displayed
You can send E-Mails

Actual behavior

Actual behaviour

Message: Could not load E-Mail, could not send E-Mail

Mail app version

5.11.5

Nextcloud version

No response

Mailserver or service

No response

Operating system

No response

PHP engine version

None

Nextcloud memory caching

No response

Web server

None

Database

None

Additional info

Error

OCA\Mail\Exception\ServiceException: Could not load message
  at OCA\Mail\Service\MailManager::getImapMessage
     /zfsinst/ed_instances/dbs-telgte/apps/mail/lib/Controller/MessagesController.php, line 219
  at OCA\Mail\Controller\MessagesController::getBody
     /zfsinst/ed_instances/dbs-telgte/lib/private/AppFramework/Http/Dispatcher.php, line 205
  at OC\AppFramework\Http\Dispatcher::executeController
     /zfsinst/ed_instances/dbs-telgte/lib/private/AppFramework/Http/Dispatcher.php, line 118
  at OC\AppFramework\Http\Dispatcher::dispatch
     /zfsinst/ed_instances/dbs-telgte/lib/private/AppFramework/App.php, line 153
  at OC\AppFramework\App::main
     /zfsinst/ed_instances/dbs-telgte/lib/private/Route/Router.php, line 321
  at OC\Route\Router::match
     /zfsinst/ed_instances/dbs-telgte/lib/base.php, line 1155
  at OC::handleRequest
     /zfsinst/ed_instances/dbs-telgte/index.php, line 25

[davidpr78]

Operating system: Linux 5.15.0-191-generic #201-Ubuntu SMP Fri Aug 7 18:39:04 UTC 2026 x86_64

Webserver: Apache/2.4.63 (Ubuntu) (apache2handler)

Database: mysql 8.0.46

PHP version: 8.2.28

Modules loaded: Core, date, libxml, openssl, pcre, zlib, filter, hash, json, random, Reflection, SPL, session, standard, sodium, apache2handler, mysqlnd, PDO, xml, apcu, bcmath, calendar, ctype, curl, dom, mbstring, FFI, fileinfo, ftp, gd, gettext, gmp, iconv, igbinary, imagick, intl, ldap, exif, mysqli, pdo_mysql, Phar, posix, readline, shmop, SimpleXML, sockets, sysvmsg, sysvsem, sysvshm, tokenizer, xmlreader, xmlwriter, xsl, zip, redis, Zend OPcache

Nextcloud version: 33.0.5 - 33.0.5.1

[odzhychko]

Hi @davidpr78, from your description I cannot see whether it is a bug and if so how to reproduce it.

Could you provide more information? For example, the following would help:

• How was the mail account configured? (e.g. UI or through php occ mail:account:create command)
• Did the mail account work after setting it up or wasn't it working after you added it?
• Does the Mail app work for other accounts but not this specific one?
  • If so, how are the different is the one broken maybe from a specific mail provider, selfhosted etc.
• Can you see other error messages in the sever log that might be related.
  • I would expect there to be an error message that shows what went wrong
    • e.g. some runtime error, a connection problem, a configuration issue etc.

[davidpr78]

Hey!

It concerns the mail accounts of all users. We have them for years now.

In nextcloud I have a warning:
stream_socket_client(): Unable to connect to tcp://xxx.serverdomain.org:587 (Connection refused) at /zfsinst/ed_instances/dbs-telgte/apps/mail/vendor/bytestream/horde-socket-client/lib/Horde/Socket/Client.php#288

and an error message:

[mail] Fehler: Could not load account mailboxes: IMAP error synchronizing account 26: Error connecting to mail server.
GET /dbs-telgte/apps/mail/

Our mail provider support says everything is fine with their servers.

[odzhychko]

Unable to connect to tcp://xxx.serverdomain.org:587 (Connection refused)

This rather clearly indicates that the connection to your mail provider does not work.
If, as you say, it worked before and is not an issue with your mail provider it might be some configuration issue on your server/container or network in general.

Please try checking, if tcp://xxx.serverdomain.org:587 is reachable by other tools (e.g. nc, traceroute etc.) from the server where Nextcloud is deployed.

I'm closing this for now as it seems not be a bug.
If you find out that it is not configuration issue and only occurs from Nextcloud that might indicate an actual bug, we can reopen it.

For troubleshooting please refer to https://docs.nextcloud.com/server/latest/admin_manual/issues/general_troubleshooting.html

[davidpr78]

Thanks for helping. We switched to roundcube on the mailserver.