Cant send Mails via Nextcloud (Basic Settings)

🚧 Installation
1

Hello :slight_smile:

i just re-setup my Nextcloud Server and imported the data without any Problem. The instance is up an Running perfectly.

Now im trying to setup the Mail-Server under Basic Settings. But i cant connect it. Im Only getting the Message: “A problem occurred while sending the email. Please revise your settings. (Error: Email could not be sent. Check your mail server log)”

The config.php gets written correctly and the server-data is set. The Server itself can be accessed without a problem via Outlook, thunderbird, webmail, etc. but the Mail-Server doesnt work, therefore i cant send my users invitational-Mails.

I checked my firewall. The Nextcloud Server sends some Packages via Port 465 which always have been accepted. Im confused and dont get whats the problem…

Anyone any idea?

2

Unfortunately, you didn’t provide any valuable information, which would allow to start analysing your issue. Therefore my recommendation is

  • fill in the default issue template and provide as much information about your environment and set-up as possible.
  • describe in detail how your network setup is looking like.
  • enable debug logging and provide the available Nextcloud log information.
  • use the search function of the forum to find threads in which such kind of issues have already been discussed.
3

Sorry, thougt the Info was Enough. Im a new user. Where can i find the “default issue template” ?

MySetup:

  • Hyper-V Servercluster
  • Two Virtual Machines (Ubuntu 22.04. LTS)
  • One Machine Only for Nextcloud 26 with default settings and ssl-connection via lets-encrypt
    → Accessible via cloud.sittamedia.com
    → Internal IP for example “192.168.1.X”
  • One Machine for iRedMail Instance Version 1.6.2, Webinterface only internal
    → Accessible (25, 465, 587, 993, icmp) via mail.sittamedia.com an internal
    → Internal IP in DMZ for example “192.168.125.200”
  • All Clients in Network “192.168.1.X” can Access the Mailserver without a Problem
  • All Clients over the Internet can Access the Mailserver without a Problem
  • For connections from my Nextcloud Server to iRedMail are the Same Firewall Rules Applied as from Normal clients.
  • When i try to connect from Nextcloud to iRedMail i see the packets over for example port 465 in my logs which get accepted an passe through, but Nextcloud shows after 1-2 seconds the Error Code "A problem occurred while sending the email. Please revise your settings. (Error: Email could not be sent. Check your mail server log)”
  • I tried to Ping my Mailserver from my Ubuntu-Nextcloud-Host, the Pings work
  • Today i tried to connect the Nextcloud Mailapp to the Mailserver, that also doesnt work. I get the Error “Imap-Server not reachable” immediately after pressing the “Connect” Button.
  • The File “nextcloud.log” in the folder “data” is empty

I searched for other threads, but i couldnt find a working solution.

4

Hi,

Just try these config params (config.php): https://github.com/nextcloud/server/issues/37329

The main point is : ‘mail_smtpauth’ => 1 or ‘mail_smtpauth’ => 0…

5

Thanks, after a long search i finally solved it thanks to your post. Putting this into my config.php did the trick:

‘mail_smtpstreamoptions’ =>
array (
‘ssl’ =>
array (
‘allow_self_signed’ => true,
‘verify_peer’ => false,
‘verify_peer_name’ => false,
),
),

2 Likes
6

This config work for me.

‘mail_smtpstreamoptions’ =>
array (
‘ssl’ =>
array (
‘allow_self_signed’ => true,
‘verify_peer’ => false,
‘verify_peer_name’ => false,
),
),

Many thanks @SIME

7

Silly question, where abouts in the config.php do I add this?

8

Still error with NC 27.0.0
How can i fix it ?

9

same here. i’ve been trying to fix it on a german allinkl server for over 3,5hrs now.

10

Where abouts in the config.php do I add this?