Denial of Service or Availability

In today's modern world, email has become essential for any company's operations to work smoothly. Help desks, for example, normally use email to receive all requests and dispatch people in order to resolve problems; asking for all requirements, favors, and reminders to be sent using the SMTP protocol has also become a more common practice.

SPAM, viruses, open relays, DoS attacks—these are just some of the vectors that can affect the availability of a mail server. After seeing how vital the SMTP service has become for business and its users, in the following sections we will emphasize measures you can take in order to avoid service downtime.

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