An end to end email monitoring system which monitors and verifies the ability of a client mail system to send and receive email messages to and from local and remote networks. The monitor tests inbound email flow, internal email services, database availability, and outbound email flow. It uses checksums for precise identification and allows emails from multiple client environments to arrive in a single, shared Internet test account. The use of multiple targets for email verification eliminates false positives due to a single email destination being unavailable. Moreover, SNMP alerting is used in addition to email alerting to provide an out of band notification method. The SNMP alerting has been enhanced to send the identification of the tested email server as the source. The monitor stores historical information for 45 days and can produce detailed reports summarizing outage events and delay occurrences in addition to providing real-time alerts.