PRTG Manual: Notification Delivery

Delivery Mechanism

Define how PRTG sends emails via the Simple Mail Transfer Protocol (SMTP):

• Use direct delivery with the built-in email server (default): Use the built-in SMTP relay server. This server manages its own email queue. For each email, it looks up the target SMTP server via the MX record of the target domain, and sends the email.
• Use one SMTP relay server (recommended in LANs/NATs): Set up your own SMTP relay server to send emails. Enter data below.
• Use two SMTP relay servers (primary and fallback server): Set up two SMTP relay servers with one as the primary relay server and one as the fallback relay server. Enter data below.

If you monitor the IT infrastructure in your network address translation (NAT) or LAN, use your own LAN-based relay server to ensure faster delivery of notification emails.

This option is not available in PRTG Hosted Monitor. PRTG Hosted Monitor uses sendgrid for email notifications. For more information, see the Paessler website: FAQ – PRTG Hosted Monitor.

Sender Email Address

Enter an email address to use as the sender of all email notifications. This setting is global and applies to all email notifications by default.

You can override the sender email in the settings of individual notification templates.

Sender Name

Enter a name to use as the sender of all email notifications. This setting is global and applies to all email notifications by default.

You can override the sender name in the settings of individual notification templates.

If the name contains angle brackets (<>), PRTG replaces them with braces ({}) for security reasons. For more information, see the Knowledge Base: What security features does PRTG include?

HELO Ident

Enter a server name for the HELO part of the mail protocol.

For some mail servers, the HELO identifier must be the valid principal host domain name for the client host. For more information, see SMTP RFC 2821.

The HELO identifier must be a unique name.

Only ASCII characters are allowed.

We recommend that you use the Domain Name System (DNS) name of the PRTG core server system.

This option is not available in PRTG Hosted Monitor.

SMTP Relay Server

This setting is only visible if you select Use one SMTP relay server (recommended in LANs/NATs) or Use two SMTP relay servers (primary and fallback server) above.

Enter the IP address or DNS name of the SMTP relay server.

This option is not available in PRTG Hosted Monitor.

SMTP Relay Port

This setting is only visible if you select Use one SMTP relay server (recommended in LANs/NATs) or Use two SMTP relay servers (primary and fallback server) above.

Enter the port for the connection to the SMTP server. The default port is 25.

This option is not available in PRTG Hosted Monitor.

SMTP Relay Authentication

This setting is only visible if you select Use one SMTP relay server (recommended in LANs/NATs) or Use two SMTP relay servers (primary and fallback server) above.

Select the kind of authentication that the SMTP server requires:

• Use no authentication (default): Use SMTP without authentication.
• Use standard SMTP authentication: Use standard authentication.
• Use SASL authentication: Use secure authentication via Simple Authentication and Security Layer (SASL).

This option is not available in PRTG Hosted Monitor.

SMTP Relay User Name

This setting is only visible if you select Use standard SMTP authentication or Use SASL authentication above.

Enter a valid user name.

This option is not available in PRTG Hosted Monitor.

SMTP Relay Password

This setting is only visible if you select Use standard SMTP authentication or Use SASL authentication above.

Enter a valid password.

This option is not available in PRTG Hosted Monitor.

Connection Security

This setting is only visible if you select Use one SMTP relay server (recommended in LANs/NATs) or Use two SMTP relay servers (primary and fallback server) above.

Define the connection security for SMTP connections:

• Use SSL/TLS if the server supports it (default): Use a Secure Sockets Layer (SSL)/Transport Layer Security (TLS) secured connection.
• Do not use connection security: Use an unsecure connection with plain text transfer.

This option is not available in PRTG Hosted Monitor.

SSL/TLS Method

This setting is only visible if you select Use one SMTP relay server (recommended in LANs/NATs) and Use SSL/TLS if the server supports it (default) above.

Select the SSL or TLS version that the SMTP server supports:

• Auto-Negotiate (TLS 1.0 or higher)

• SSLv3

• TLS 1.0
• TLS 1.1
• TLS 1.2
• TLS 1.3

If you select Auto-Negotiate (TLS 1.0 or higher), PRTG uses the highest available TLS level supported by the SMTP endpoint.

This is only relevant for secure connections. If you do not get a connection, try a different setting.

This option is not available in PRTG Hosted Monitor.

SMTP Relay Server (Fallback)

This setting is only visible if you select Use two SMTP relay servers (primary and fallback server) above.

Enter the IP address or DNS name of the fallback SMTP relay server.

This option is not available in PRTG Hosted Monitor.

SMTP Relay Port (Fallback)

This setting is only visible if you select Use two SMTP relay servers (primary and fallback server) above.

Enter the port for the connection to the fallback SMTP server. The default port is 25.

This option is not available in PRTG Hosted Monitor.

SMTP Relay Authentication (Fallback)

This setting is only visible if you select Use two SMTP relay servers (primary and fallback server) above.

Select the kind of authentication that the fallback SMTP server requires:

• Use no authentication (default): Use SMTP without authentication.
• Use standard SMTP authentication: Use standard authentication.
• Use SASL authentication: Use secure authentication via Simple Authentication and Security Layer (SASL).

This option is not available in PRTG Hosted Monitor.

SMTP Relay User Name (Fallback)

This setting is only visible if you select Use two SMTP relay servers (primary and fallback server) and Use standard SMTP authentication or Use SASL authentication above.

Enter a valid user name.

This option is not available in PRTG Hosted Monitor.

SMTP Relay Password (Fallback)

This setting is only visible if you select Use two SMTP relay servers (primary and fallback server) and Use standard SMTP authentication or Use SASL authentication above.

Enter a valid password.

This option is not available in PRTG Hosted Monitor.

Connection Security (Fallback)

This setting is only visible if you select Use two SMTP relay servers (primary and fallback server) above.

Define the connection security for SMTP connections:

• Use SSL/TLS if the server supports it (default): Use a Secure Sockets Layer (SSL)/Transport Layer Security (TLS) secured connection.
• Do not use connection security: Use an unsecure connection with plain text transfer.

This option is not available in PRTG Hosted Monitor.

SSL/TLS Method (Fallback)

This setting is only visible if you select Use two SMTP relay servers (primary and fallback server) and Use SSL/TLS if the server supports it (default) above.

Select the SSL or TLS version that the SMTP server supports:

• Auto-Negotiate (TLS 1.0 or higher)

• SSLv3

• TLS 1.0
• TLS 1.1
• TLS 1.2
• TLS 1.3

If you select Auto-Negotiate (TLS 1.0 or higher), PRTG uses the highest available TLS level supported by the SMTP endpoint.

This is only relevant for secure connections. If you do not get a connection, try a different setting.

This option is not available in PRTG Hosted Monitor.

Test SMTP Settings

Click Test SMTP Settings to test your SMTP notification delivery configuration.

• Email Address: Enter an email address to send the test email notification to.
• Subject: Enter a subject for the test email notification.

Configuration Mode

Define a mode for the SMS delivery configuration:

• Disable SMS delivery (default): Do not use SMS delivery.
• Select an SMS provider from a list of providers: Select a provider from a list below.
• Enter a custom URL for a provider not listed: Use a different provider and manually enter the custom URL below.

Service Provider

This setting is only visible if you select Select an SMS provider from a list of providers above.

Select a service provider from the list:

• BulkSMS All regions (except South Africa): Enter a User Name and Password below.

• • URL: https://www.bulksms.co.uk:443/eapi/submission/send_sms/2/2.0
  • Port: 443

• BulkSMS South Africa: Enter a User Name and Password below.

• • URL: https://bulksms.2way.co.za:443/eapi/submission/send_sms/2/2.0
  • Port: 443

• Agile Telecom: Enter a User Name and Password below.

• • URL: http://agiletelecom.com/smshurricane3.0.asp
  • Port: 80
• Esendex: Enter a User Name, Password, and Account below.
  • URL: https://www.esendex.com/secure/messenger/formpost/SendSMS.aspx
  • Port: 443

Some providers might require a port configuration in your firewall. Use the respective port from the list above.

User Name

This setting is only visible if you select Select an SMS provider from a list of providers above.

Enter a user name for the service provider account.

Password

This setting is only visible if you select Select an SMS provider from a list of providers above.

Enter a password for the service provider account.

Account

This setting is only visible if you select Select an SMS provider from a list of providers and Esendex above.

Enter the account number or the API ID to connect your account if your provider asks you to register, for example EX0000000. Enter a string or leave the field empty.

Custom URL

This setting is only visible if you select Enter a custom URL for a provider not listed above.

From the documentation of your SMS provider, enter the service URL that it uses to send SMS messages.

Use the following placeholders for the recipient phone number and the text message:

• %SMSNUMBER
• %SMSTEXT

Use the GET method to request the custom URL. POST requests are not supported.

HTTP Authentication

This setting is only visible if you select Enter a custom URL for a provider not listed above.

Select if PRTG uses HTTP basic authentication when it calls the custom URL of the SMS provider:

• Do not use HTTP basic authentication (default)
• Use HTTP basic authentication

HTTP basic authentication is necessary if the custom URL looks like this https://[username]:[password]@my.custom.sms.provider/.

Custom SNI

This setting is only visible if you select Enter a custom URL for a provider not listed above.

Define if PRTG sends the Server Name Indication (SNI) extension to the Transport Layer Security (TLS) protocol along with the HTTP request:

• Do not send SNI (default): PRTG does not send the SNI when it executes the HTTP action.
• Send SNI: PRTG sends the SNI when it calls the target URL. Specify the SNI below.

Encoding for SMS

This setting is only visible if you select Enter a custom URL for a provider not listed above.

Define the encoding of the URL string that PRTG sends to the SMS provider:

• ANSI local system code page (default)
• UTF-8
• UTF-16

Virtual Host (SNI)

Enter the SNI name that the endpoint configuration requires. Usually, this is the fully qualified domain name (FQDN) of the virtual host.

Maximum Length of Text

Some SMS providers do not allow SMS messages that exceed a certain amount of characters. PRTG restricts the number of characters according to the length specified in this field. A value of 0 means that PRTG sends the entire SMS.

The use of some special characters, especially ones that are not in the GSM-7 alphabet, might cause the message to be cut off after 70 characters and the special characters might not display properly. The exact results depend on which SMS provider you use.

Test SMS Settings

Click Test SMS Settings to test your SMS notification delivery configuration.

• Number: Enter a phone number to send the test SMS notification to.
• Message: Enter a message for the test SMS notification.