Email Configuration¶
Nextcloud is capable of sending password reset emails, notifying users of new file shares, changes in files, and activity notifications. Your users configure which notifications they want to receive on their Personal pages.
Nextcloud does not contain a full email server, but rather connects to your existing mail server. You must have a functioning mail server for Nextcloud to be able to send emails. You may have a mail server on the same machine as Nextcloud, or it may be a remote server.
Nextcloud 7 introduces a new feature, the graphical Email Configuration Wizard.
With the new wizard, connecting Nextcloud to your mail server is fast and easy.
The wizard fills in the values in config/config.php, so you may use either
or both as you prefer.
The Nextcloud Email wizard supports three types of mail server connections: SMTP, PHP, and Sendmail. Use the SMTP configurator for a remote server, and PHP or Sendmail when your mail server is on the same machine as Nextcloud.
Note
The Sendmail option refers to the Sendmail SMTP server, and any
drop-in Sendmail replacement such as Postfix, Exim, or Courier. All of
these include a sendmail binary, and are freely-interchangeable.
Configuring an SMTP Server¶
You need the following information from your mailserver administrator to connect Nextcloud to a remote SMTP server:
- Encryption type: None, SSL, or TLS
- The From address you want your outgoing Nextcloud mails to use
- Whether authentication is required
- Authentication method: None, Login, Plain, or NT LAN Manager
- The server’s IP address or fully-qualified domain name
- Login credentials, if required
Your changes are saved immediately, and you can click the Send Email button to test your configuration. This sends a test message to the email address you configured on your Personal page. The test message says:
If you received this email, the settings seem to be correct.
--
Nextcloud
a safe home for all your data
Configuring PHP and Sendmail¶
Configuring PHP or Sendmail requires only that you select one of them, and then enter your desired return address.
How do you decide which one to use? PHP mode uses your local sendmail
binary. Use this if you want to use php.ini to control some of your mail
server functions, such as setting paths, headers, or passing extra command
options to the sendmail binary. These vary according to which server you
are using, so consult your server’s documentation to see what your options are.
In most cases the smtp option is best, because it removes the extra step of
passing through PHP, and you can control all of your mail server options in one
place, in your mail server configuration.
Using Email Templates¶
Another useful new feature is editable email templates. Now you can edit Nextcloud’s email templates on your Admin page. These are your available templates:
- Sharing email (HTML) – HTML version of emails notifying users of new file shares
- Sharing email (plain text fallback) – Plain text email notifying users of new file shares
- Lost password mail – Password reset email for users who lose their passwords.
- Activity notification mail – Notification of activities that users have enabled in the Notifications section of their Personal pages.
In addition to providing the email templates, this feature enables you to apply any preconfigured themes to the email.
To modify an email template to users:
- Access the Admin page.
- Scroll to the Mail templates section.
- Select a template from the drop-down menu.
- Make any desired modifications to the template.
The templates are written in PHP and HTML, and are already loaded with the relevant variables such as username, share links, and filenames. You can, if you are careful, edit these even without knowing PHP or HTML; don’t touch any of the code, but you can edit the text portions of the messages. For example, this the lost password mail template:
<?php
echo str_replace('{link}', $_['link'], $l->t('Use the following link to
reset your password: {link}'));
You could change the text portion of the template, Use the following link to
reset your password: to say something else, such as Click the following link
to reset your password. If you did not ask for a password reset, ignore this
message.
Again, be very careful to change nothing but the message text, because the tiniest coding error will break the template.
Note
You can edit the templates directly in the template text box, or you can copy and paste them to a text editor for modification and then copy and paste them back to the template text box for use when you are done.
Setting Mail Server Parameters in config.php¶
If you prefer, you may set your mail server parameters in config/config.php.
The following examples are for SMTP, PHP, Sendmail, and Qmail.
SMTP¶
If you want to send email using a local or remote SMTP server it is necessary to enter the name or IP address of the server, optionally followed by a colon separated port number, e.g. :425. If this value is not given the default port 25/tcp will be used unless you change that by modifying the mail_smtpport parameter.
<?php
"mail_smtpmode" => "smtp",
"mail_smtphost" => "smtp.server.dom:425",
or
<?php
"mail_smtpmode" => "smtp",
"mail_smtphost" => "smtp.server.dom",
"mail_smtpport" => 425,
If a malware or SPAM scanner is running on the SMTP server it might be necessary that you increase the SMTP timeout to e.g. 30s:
<?php
"mail_smtptimeout" => 30,
If the SMTP server accepts insecure connections, the default setting can be used:
<?php
"mail_smtpsecure" => '',
If the SMTP server only accepts secure connections you can choose between the following two variants:
SSL¶
A secure connection will be initiated using the outdated SMTPS protocol which uses the port 465/tcp:
<?php
"mail_smtphost" => "smtp.server.dom:465",
"mail_smtpsecure" => 'ssl',
TLS¶
A secure connection will be initiated using the STARTTLS protocol which uses the default port 25/tcp:
<?php
"mail_smtphost" => "smtp.server.dom",
"mail_smtpsecure" => 'tls',
And finally it is necessary to configure if the SMTP server requires authentication, if not, the default values can be taken as is.
<?php
"mail_smtpauth" => false,
"mail_smtpname" => "",
"mail_smtppassword" => "",
If SMTP authentication is required you have to set the required username and password and can optionally choose between the authentication types LOGIN (default) or PLAIN.
<?php
"mail_smtpauth" => true,
"mail_smtpauthtype" => "LOGIN",
"mail_smtpname" => "username",
"mail_smtppassword" => "password",
PHP mail¶
If you want to use PHP mail it is necessary to have an installed and working email system on your server. Which program in detail is used to send email is defined by the configuration settings in the php.ini file. (On *nix systems this will most likely be Sendmail.) Nextcloud should be able to send email out of the box.
<?php
"mail_smtpmode" => "php",
"mail_smtphost" => "127.0.0.1",
"mail_smtpport" => 25,
"mail_smtptimeout" => 10,
"mail_smtpsecure" => "",
"mail_smtpauth" => false,
"mail_smtpauthtype" => "LOGIN",
"mail_smtpname" => "",
"mail_smtppassword" => "",
Sendmail¶
If you want to use the well known Sendmail program to send email, it is necessary to have an installed and working email system on your *nix server. The sendmail binary (/usr/sbin/sendmail) is usually part of that system. Nextcloud should be able to send email out of the box.
<?php
"mail_smtpmode" => "sendmail",
"mail_smtphost" => "127.0.0.1",
"mail_smtpport" => 25,
"mail_smtptimeout" => 10,
"mail_smtpsecure" => "",
"mail_smtpauth" => false,
"mail_smtpauthtype" => "LOGIN",
"mail_smtpname" => "",
"mail_smtppassword" => "",
qmail¶
If you want to use the qmail program to send email, it is necessary to have an installed and working qmail email system on your server. The sendmail binary (/var/qmail/bin/sendmail) will then be used to send email. Nextcloud should be able to send email out of the box.
<?php
"mail_smtpmode" => "qmail",
"mail_smtphost" => "127.0.0.1",
"mail_smtpport" => 25,
"mail_smtptimeout" => 10,
"mail_smtpsecure" => "",
"mail_smtpauth" => false,
"mail_smtpauthtype" => "LOGIN",
"mail_smtpname" => "",
"mail_smtppassword" => "",
Send a Test Email¶
To test your email configuration, save your email address in your personal settings and then use the Send email button in the Email Server section of the Admin settings page.
Troubleshooting¶
If you are unable to send email, try turning on debugging. Do this by enabling
the mail_smtpdebug parameter in config/config.php.
<?php
"mail_smtpdebug" => true;
Note
Immediately after pressing the Send email button, as described before, several SMTP -> get_lines(): ... messages appear on the screen. This is expected behavior and can be ignored.
Question: Why is my web domain different from my mail domain?
Answer: The default domain name used for the sender address is the hostname where your Nextcloud installation is served. If you have a different mail domain name you can override this behavior by setting the following configuration parameter:
<?php
"mail_domain" => "example.com",
This setting results in every email sent by Nextcloud (for example, the password reset email) having the domain part of the sender address appear as follows:
no-reply@example.com
Question: How can I find out if an SMTP server is reachable?
Answer: Use the ping command to check the server availability:
ping smtp.server.dom
PING smtp.server.dom (ip-address) 56(84) bytes of data.
64 bytes from your-server.local.lan (192.168.1.10): icmp_req=1 ttl=64
time=3.64ms
Question: How can I find out if the SMTP server is listening on a specific TCP port?
Answer: The best way to get mail server information is to ask your mail
server admin. If you are the mail server admin, or need information in a
hurry, you can use the netstat command. This example shows all active
servers on your system, and the ports they are listening on. The SMTP server is
listening on localhost port 25.
# netstat -pant
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State ID/Program name
tcp 0 0 0.0.0.0:631 0.0.0.0:* LISTEN 4418/cupsd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2245/exim4
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 1524/mysqld
- 25/tcp is unencrypted smtp
- 110/tcp/udp is unencrypted pop3
- 143/tcp/udp is unencrypted imap4
- 465/tcp is encrypted ssmtp
- 993/tcp/udp is encrypted imaps
- 995/tcp/udp is encrypted pop3s
Question: How can I determine if the SMTP server supports the outdated SMTPS protocol?
Answer: A good indication that the SMTP server supports the SMTPS protocol is that it is listening on port 465.
Question: How can I determine what authorization and encryption protocols the mail server supports?
Answer: SMTP servers usually announce the availability of STARTTLS
immediately after a connection has been established. You can easily check this
using the telnet command.
Note
You must enter the marked lines to obtain the information displayed.
telnet smtp.domain.dom 25
Trying 192.168.1.10...
Connected to smtp.domain.dom.
Escape character is '^]'.
220 smtp.domain.dom ESMTP Exim 4.80.1 Tue, 22 Jan 2013 22:39:55 +0100
EHLO your-server.local.lan # <<< enter this command
250-smtp.domain.dom Hello your-server.local.lan [ip-address]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN CRAM-MD5 # <<< Supported auth protocols
250-STARTTLS # <<< Encryption is supported
250 HELP
QUIT # <<< enter this command
221 smtp.domain.dom closing connection
Connection closed by foreign host.
Enabling Debug Mode¶
If you are unable to send email, it might be useful to activate further debug messages by enabling the mail_smtpdebug parameter:
<?php
"mail_smtpdebug" => true,
Note
Immediately after pressing the Send email button, as described before, several SMTP -> get_lines(): ... messages appear on the screen. This is expected behavior and can be ignored.