Nextcloud email settings problem

ℹ️ Support
1

Hei,
i tryng nextcloud first time.
I have one problem with email settings ( smtp )
When i fill the necessary fields ( all mail settings are correct ), then tryng to send test mail.
I get this error message:

A problem occurred while sending the email. Please revise your settings. (Error: Connection could not be established with host myhostname [ #0])

Nextcloud log sayng this error:
[authz_core:error] [pid 4725] [client IPaddress:56668] AH01630: client denied by server configuration: /var/www/nextcloud/data/htaccesstest.txt

Server configuration:
ubuntu server 14.04.5
Apache version 2.4
PHP 7.0
Nextcloud version 10.0

I would be very thankful if i find the solution to the problem.
have a nice day :slight_smile:

2

Can you put this in your config/config.php in order to get more details in your logs:

/**
 * Enable SMTP class debugging.
 */

'mail_smtpdebug' => true,

If you control the mail server as well, you can check the logfiles there as well.

3

Hei,
i add ‘mail_smtpdebug’ => true, in my config.php.
Where i see more information?
I see my apache site log /var/www/apache2/pilv_error.log and /var/www/apache2/error.log
Admin panel see same error log:
A problem occurred while sending the email. Please revise your settings. (Error: Connection could not be established with host mail.addit.ee [ #0])

4

Are you sending through php? Or smtp?
The new log-option should create entries in your Nextcloud-logfile.

5

Hei,
i send mail over smtp.
I see my mailserver this error:
warning: TLS library problem: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca:s3_pkt.c:1263:SSL alert number 48

6

there seems to be a problem with the certificate:
https://ssl-tools.net/mailservers/addit.ee

7

Hey,
Thank you, i found solution :slight_smile:

8

Would be nice to let others know what your solution was.

9

Hei,
my solution are here:

i add my postfix conf my CA cert file.
ubuntu server 16.04 location /etc/postfix/main.cf
And i add this line in TLS parameters:

TLS parameters
smtpd_tls_CAfile = /etc/ssl/certs/CAfile.crt

its worked for me :slight_smile:

10

I was using the cert.pem instead of the fullchain.pem (From letsencrypt) on my mailserver and got this error. You can check your emailserver here: www.sslshopper.com

Working without problem using the fullchain.pem

11

For those who would like to use smtp.gmail.com (after setting at myaccount.google.com ), port 587 did not work but port 465 worked when “Encryption: SSL/TLS” is chosen at “Email server” setting of Nextcloud.

In fact, www.sslshopper.com/ssl-checker.html#hostname=smtp.gmail.com:587 showed “No SSL”, but 465 displayed its certificate info.

12

Hi, I also simply changed port to 465 and it is working, can someone explan maybe? Thanks