Configure email

To send email notifications, you need to:

Configure an SMTP server

Before sending notifications via email, the system needs to know about the SMTPSimple Mail Transfer Protocol (SMTP) is the mechanism by which an email client program sends emails to an outgoing mail server (SMTP server) for delivery to the intended email address. server that is sending the emails. The SMTP server can be internal or external to your organization, however, it must allow forwarding of emails to your users. The SMTP server is typically the same server that users set in their email application to send email.


PaperCut comes with the a number of popular SMTP services preconfigured to simplify the configuration process. If these are used, you need to provide only the login credentials of the SMTP server.

To set the SMTP server:

  1. Select Options > Notifications.

    The Notifications page is displayed.

  2. In the SMTP Server Options area, select either:

    1. a preconfigured SMTP server.

    2. Custom to configure a custom SMTP server. For custom configuration, see Custom SMTP Server Setup.

  3. Enter the username and password for that service.

  4. Click Apply.


Anti-virus software running on the PaperCut server can block/disallow SMTP connections because it attempts to block spam sent by viruses and trojans. Ensure that any anti-virus software is configured to allow PaperCut to make SMTP connections (e.g. add an exception or disable the SMTP blocking). When anti-virus is blocking email delivery, PaperCut NG/MF logs errors, such as: Mail server connection failed. Software caused connection abort.. These errors are displayed in the application logThe application log retains a complete history of system events, such as security errors (such as incorrect password attempts), user logins, backup times and scheduled tasks, any system errors or warning. or on-screen when performing email notification tests. If there are other SMTP connection problems, you should check that your firewall allows SMTP connections, and that your SMTP server is configured to accept connections from the PaperCut server.

Custom SMTP server setup

If your SMTP server is not listed in the preconfigured SMTP server list, you can configure the SMTP server manually by providing the following details:

Table 87: Custom SMTP server fields
Field Name Description
Host Your SMTP server hostname.
Port The port to connect to on the SMTP server. Common ports include 25 or 587 for TLS, and 465 for SMTPS(SSLSecure Sockets Layer (SSL) is the standard security technology for establishing an encrypted link between a web server and a browser. This link ensures that all data passed between the web server and browsers remain private and integral. The protocol uses a third party, a Certificate Authority (CA), to identify one end or both end of the transactions. To be able to create an SSL connection a web server requires an SSL certificate. When you choose to activate SSL on your web server you will be prompted to complete a number of questions about the identity of your website and your company. Your web server then creates two cryptographic keys - a Private Key and a Public Key.).
Encryption Choose between None, SSL and TLS.
Username Username for SMTP authentication. Typically an email address.
Password Password for SMTP authentication.

Configure email addresses

To send notification messages to users via email, an email address needs to be defined for the user. Enter user email addresses in the User Details screen. However, if all email addresses match the pattern [username], then you can define the email address globally using the global email suffix. An example of how this works is as follows:

  1. An email notification needs to be sent to user brian.

  2. No email address has been defined in Brian's user details, but a global email suffix of is defined in the Email Options area.

  3. To generate Brian's email address, the username (brian) and suffix ( are combined to form the email address

To define the global email suffix:

  1. Select Options > Notifications.

    The Notifications page is displayed.

  2. In the Email Options area, select the Use email suffix to build user email addresses check box.

  3. Enter the Email Address Suffix.

  4. Click Apply.

To confirm that the email suffix is working as expected:

  1. Click the Users tab.

    The User List page is displayed.

  2. Select a user.

    The User Details page is displayed.

  3. Select the Use global email suffix check box. The email field contains the address constructed from the username and suffix.


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