Customer Monitor provides tools for monitoring of your mail systems.

Thanks to CM-Watches, it's possible to track basic functionality of mail systems via standardized response from POP3 and SMTP servers [1].

More complex options are provided by CM Watch with condition Email looping test [2], which monitors real submission and reception of mails through different servers.
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If you use CM Watch to monitor the function of E-mail services, the operator will be informed in advance about occurence of the problem.