3.7 SMTP

SMTP

The Simple Mail Transfer Protocol (SMTP) is an Internet protocol used for e-mail transmissions across the Internet between clients and the server. The protocol provides deliveries via a direct sender-receiver connection.

E-mail messages can be sent via the SMTP client and received via the SMTP server in the NetStar PBX. See below for details. E-mail messages are routed by the PBX in the same way as SMS messages, i.e. using such objects as text routers and the SMS routing tab.

SMTP Clients

2N® NetStar provides more than one Ethernet interface. For communication with the SMTP server, however, the PBX always uses the CPU Ethernet interface. In the Virtual ports – SMTP menu you can create SMTP clients to log into the SMTP servers and send e-mail messages.

Figure: View of SMTP Client Configuration

  • Network interface – choose the network interface to be used for SMTP communication with the server. In this version you can use the CPU network interface only.
  • Outgoing mail server – enter the IP address of the SMTP server. If you use the DNS server, you can also use the domain name of your SMTP server.
  • Port – define the port to be used for communication with the SMTP server. Typically, port 25 is used.
  • E-mail address – is used for identification of incoming messages within the SMTP server. Without a correct setup, the SMTP server will probably reject all connection establishment requests! 
  • Authentication – choose the type of authentication for access to your e-mail account on the selected SMTP server.
    • None
    • Plain
    • Login
    • Digest_MD5
    • Cram_MD5
  • Account name – provide the name of the e-mail account registered by the selected SMTP server. Required by all the above mentioned methods.
  • Password – set the account access password required by all the above mentioned methods.

SMTP Server (SMTPD)

The SMTP server processes incoming e-mail messages. 

  • Port – set the port on which incoming e-mails for this SMTP server are awaited. Two PBX SMTP servers may not have one and the same port.
  • Queue length – set the count of e-mail messages to be queued and subsequently processed by the server (routed to final destinations in the PBX or resent to another interface). If you set 1, the server will not receive an e-mail processing request until it completes the preceding one.
  • Authorised group – authorise incoming e-mails. The following options are available:
    • Without authorisation – incoming e-mails are accepted without authorisation.
    • Any – the e-mails matching any PBX user login are accepted.
    • Group of users – the e-mails matching user logins from a certain user group are accepted. If a superior group is selected, all the subgroup users are included too.

Figure: View of SMTP Server Configuration