Simple Mail Transfer Protocol (Smtp) Servers - Mantracourt T24-ACMi-SA User Manual

Simple Mail Transfer Protocol (SMTP) Servers

The T24-RDC requires the name or the IP address of an SMTP server as part of its configuration. The SMTP server
delivers messages on behalf of the user; the T24-RDC can use the services of an e-mail provider that is not
necessarily the same as the connection provider (ISP). This means the location of a client within a network or
outside of a network, is not a limiting factor for e-mail submission or delivery, i.e. the same SMTP server can be
used regardless of the ISP being used.
Some ISP's intercept port 25, so that it is not possible for their users to send mail via a relaying SMTP server
outside the ISP's network using port 25; they are restricted to using the ISP's SMTP server. Some independent
SMTP servers support an additional port other than 25 to allow users with authenticated access to connect to
them even if port 25 is blocked. The practical purpose of this is that a mobile user connecting to different ISPs
otherwise has to change SMTP server settings on the mail client for each ISP; using a relaying SMTP server allows
the SMTP client settings to be used unchanged worldwide.
The SMTP service must support AUTH LOGIN authentication or allow unauthenticated access.
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Mantracourt Electronics Limited T24 Telemetry User Manual