Automatically send unique errors (with count) from Apache error log as email. Details at http://sudarmuthu.com/blog/automatically-send-unique-errors-with-count-from-apache-error-log-as-email/

apache-error-mailer.py

#!/usr/bin/env python

import sys
import mandrill

MANDRILL_API_KEY = "api-key"
EMAIL_FROM = "[email protected]"
EMAIL_TO = "[email protected]"
EMAIL_SUBJECT = "Error Log"

def send_mail(content):
    """Send email using Mandrill API"""
    mandrill_client = mandrill.Mandrill(MANDRILL_API_KEY)
    message = {
        'auto_html': True,
        'auto_text': None,
        'to': [{'email': EMAIL_TO, 'type': 'to'}],
        'from_email': EMAIL_FROM,
        'subject': EMAIL_SUBJECT,
        'html': content,
        'track_clicks': None,
        'tags': ['error-log']
    }
    result = mandrill_client.messages.send(message=message, async=False)


if __name__ == '__main__':
    lines = []
    for line in sys.stdin:
        lines.append(line.strip())

    content = "<br>".join(filter(None, lines))

    if len(content) > 0:
        send_mail(content)

logrotate.conf

/path/to/log/*.log  {
        daily
        missingok
        rotate 10000
        compress
        delaycompress
        notifempty
        dateext
        create 660 root www-data
        sharedscripts
        postrotate

        if [ -f "`. /etc/apache2/envvars ; echo ${APACHE_PID_FILE:-/var/run/apache2.pid}`" ]; then
            /etc/init.d/apache2 reload > /dev/null
        fi

        endscript
        prerotate

            awk -F'[\[\]]+' '$4 == "error"{print $7}' /path/to/error.log | sort | uniq -c | sor -nr | /path/to/apache-error-mailer.py

        endscript