Sendmail integration

Install the infrastructure agent

To use the Sendmail integration, you need to first install the infrastructure agent on the same host. The infrastructure agent monitors the host itself, while the integration you'll install in the next step extends your monitoring with Sendmail-specific data.

Use NRI-Flex to capture metrics

Flex allows you to capture Apache Zookeeper metrics. It comes bundled with the New Relic infrastructure agent you installed in the previous step.

1. Create a file named sendmail-flex-config.yml in the /newrelic-infra/integrations.d path.

2. Update the sendmail-flex-config.yml with the following configuration example.

   Make sure to replace FAILED_MESSAGES_FILE_NAME references with your file name. To find this file name, go to /var/mail/ and check the file that has been created for failed messages.

   ---
   integrations:
   - name: nri-flex
       config:
       name: sendmailFlex
       apis:
           #check if Sendmail service is up.
           - event_type: SendmailUp
           commands:
               - run: echo "value:$(systemctl status sendmail | grep 'Active':' active (running)' | wc -l)"
               split_by: ':'
   
           #check if Sendmail service is down.
           - event_type: SendmailDown
           commands:
               - run: echo "value:$(systemctl status sendmail | grep 'Active':' inactive (dead)' | wc -l)"
               split_by: ':'
   
           #Read the number of times SMTP service is unreachable.
           - event_type: SendmailSMTPserviceUnreachable
           commands:
               - run: echo "value:$(cat /var/log/mail.log | grep -E 'stat=Service unavailable' | wc -l)"
               split_by: ':'
   
           #Read the count of error message - host not found.
           - event_type: SendmailHostNotFound
           commands:
               - run: echo "value:$(cat /var/log/mail.log | grep -c 'host not found')"
               split_by: ':'
   
           #Read the count of error logged.
           - event_type: SendmailErrorCount
           commands:
               - run: echo "value:$(cat /var/log/mail.err | wc -l)"
               split_by: ':'
   
           #Read the number of messages accepted for delivery.
           - event_type: SendmailMessageAcceptedForDelivery
           commands:
               - run: echo "value:$(cat /var/log/mail.log | grep -c 'Message accepted for delivery')"
               split_by: ':'
   
           #Read the number of messages sent & deferred.
           - event_type: SendmailMessageStatus
           commands:
               - run: echo "sent:$(cat /var/log/mail.log | grep 'stat=Sent' |  wc -l)"
               split_by: ':'
               - run: echo "deferred:$(cat /var/log/mail.log | grep 'stat=Deferred' |  wc -l)"
               split_by: ':'
   
           #Read the number of messages held by user.
           #Go to the path "/var/mail/" and check the file that has been created for failed messages and accordingly update "FAILED_MESSAGES_FILE_NAME" in the below command.
           - event_type: SendmailHeldMessage
           commands:
               - run: echo "value:$(cat /var/mail/FAILED_MESSAGES_FILE_NAME | grep -c 'Subject:')"
               split_by: ':'
   
           #Read the number of connection timeout.
           - event_type: SendmailConnectionTimeOut
           commands:
               - run: echo "value:$(cat /var/log/mail.log | grep -c 'timeout')"
               split_by: ':'
   
           #Read the recipients with message count.
           - event_type: SendmailRecipientsbyMessageCount
           commands:
               - run: cat /var/log/mail.log | grep "to=<.*.>" | awk '{n=split($7,a,"to="); print a[1],a[2]}' | cut -d "<" -f2 |cut -d ">" -f1 | sort | uniq -c | sort -nr
               split: horizontal
               header_split_by: \s+(\d+)\s+(.*.)
               set_header: [msgCount.total, recipients.total]
               regex_match: true
               split_by: \s+(\d+)\s+(.*.)
               - run: cat /var/log/mail.log | grep "to=<.*.>" | grep "$(date +'%b %e')" | awk '{n=split($7,a,"to="); print a[1],a[2]}' | cut -d "<" -f2 |cut -d ">" -f1 | sort | uniq -c | sort -nr
               split: horizontal
               header_split_by: \s+(\d+)\s+(.*.)
               set_header: [msgCount.latest, recipients.latest]
               regex_match: true
               split_by: \s+(\d+)\s+(.*.)
   
           #Read the recipients host/domain.
           - event_type: SendmailRecipientsHostname
           commands:
               - run: cat /var/log/mail.log | grep "to=<.*.>" | awk '{print $7}' | grep -oE '[^@]+[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,}' | sort | uniq -c
               split: horizontal
               header_split_by: \s+(\d+)\s+(.*.)
               set_header: [hostCount.total, hostname.total]
               regex_match: true
               split_by: \s+(\d+)\s+(.*.)
               - run: cat /var/log/mail.log | grep "to=<.*.>" | grep "$(date +'%b %e')" | awk '{print $7}' | grep -oE '[^@]+[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,}' | sort | uniq -c
               split: horizontal
               header_split_by: \s+(\d+)\s+(.*.)
               set_header: [hostCount.latest, hostname.latest]
               regex_match: true
               split_by: \s+(\d+)\s+(.*.)
   
           #Read the senders with message count.
           - event_type: SendmailSendersbyMessageCount
           commands:
               - run: cat /var/log/mail.log | grep "from=<.*@.*>" | awk '{print $7}' | cut -d "<" -f2 |cut -d ">" -f1 | sort | uniq -c
               split: horizontal
               header_split_by: \s+(\d+)\s+(.*.)
               set_header: [msg.total, senders.total]
               regex_match: true
               split_by: \s+(\d+)\s+(.*.)
               - run: cat /var/log/mail.log | grep "from=<.*@.*>" | grep "$(date +'%b %e')" | awk '{print $7}' | cut -d "<" -f2 |cut -d ">" -f1 | sort | uniq -c
               split: horizontal
               header_split_by: \s+(\d+)\s+(.*.)
               set_header: [msg.latest, senders.latest]
               regex_match: true
               split_by: \s+(\d+)\s+(.*.)
   
           #Read the senders host/domain.
           - event_type: SendmailSendersHostname
           commands:
               - run: cat /var/log/mail.log | grep "from=<.*.>" | awk '{print $7}' | grep -oE '[^@]+[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,}' | sort | uniq -c
               split: horizontal
               header_split_by: \s+(\d+)\s+(.*.)
               set_header: [hostCount.total, hostname.total]
               regex_match: true
               split_by: \s+(\d+)\s+(.*.)
               - run: cat /var/log/mail.log | grep "from=<.*.>" | grep "$(date +'%b %e')" | awk '{print $7}' | grep -oE '[^@]+[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,}' | sort | uniq -c
               split: horizontal
               header_split_by: \s+(\d+)\s+(.*.)
               set_header: [hostCount.latest, hostname.latest]
               regex_match: true
               split_by: \s+(\d+)\s+(.*.)

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Forward your Sendmail logs to New Relic

You can use our log forwarding capability to forward Sendmail logs to New Relic.

Add the following script to /etc/newrelic-infra/logging.d/logging.yml:

logs:
- name: mail.log
    file: /var/log/mail.log
    attributes:
    logtype: sendmail_log
- name: mail.err
    file: /var/log/mail.err
    attributes:
    logtype: sendmail_error

Restart the New Relic infrastructure agent

Before you can start reading your data, use the instructions in our infrastructure agent docs to restart your infrastructure agent.

$
sudo systemctl restart newrelic-infra.service

In a couple of minutes, your application will send metrics to one.newrelic.com.

Find your data

You can choose our pre-built dashboard template named Sendmail to monitor your Sendmail application metrics. Follow these steps to use our pre-built dashboard template:

1. From one.newrelic.com, go to the + Integrations & Agents page.

2. Click on Dashboards.

3. In the search bar, type sendmail.

4. The Sendmail dashboard should appear. Click on it to install it.

   Your Sendmail dashboard is considered a custom dashboard and can be found in the Dashboards UI. For docs on using and editing dashboards, see our dashboard docs.

   Here is a NRQL query to find your latest message's sent status:

   SELECT latest(sent) as 'Sent', latest(deferred) as ‘Deferred’ 
   FROM SendmailMessageStatus

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   Here is a NRQL query to find view the Sendmail service status:

   SELECT latest(value) as 'Service Up' 
   FROM SendmailUp 
   TIMESERIES AUTO

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