# SMTP server

The integrated e-mail service allows user-driven or automated sending of operation or system messages, such as voice mail messages or messages on system events. This view allows you to configure the access to the SMTP server of the e-mail service provider.

Table 1. Settings for access to the SMTP server
Parameter | Explanation
IP address / host name | IP address or host name of the SMTP server.
Port | Port of the SMTP server (default entry: 25)
User name | User name according to vendor specifications The user name often corresponds to the e-mail address.
Password | Password for authentication on the SMTP server.
Sender address | E-mail address of the communication server.
E-mail max. size (MByte) | Enter here the maximum e-mail size allowed by the SMTP server. If the e-mail to be sent exceeds the maximum size, it is sent without attachment.
Approximate recording time | This information can be used, in particular, to estimate the recording duration of voice mail voice messages and call recordings in G.711 format with the selected maximum e-mail size.
Encrypted authentication only | Authentication on the SMTP server is effected only if the server supports encryption in accordance with the CRAM-MD5 method. If the SMTP server supports the CRAM-MD5 method, the SMTP client authenticates itself using encryption. If the SMTP server does not support the CRAM-MD5 method, the SMTP client authenticates itself without using encryption.
Secure connection via SSL | The connection from the communication server to the SMTP server is encrypted with SSL (Secure Sockets Layer).

Note:

The communication server cannot receive any e-mails. Administrator messages from the SMTP server are not evaluated.

Parent topic: IP Security
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