E-Mail (Smtp And Pop3) - JUMO mTRON T Manual

5 Ethernet transmission modes
5.7

E-mail (SMTP and POP3)

The central processing unit can send e-mails (e.g. alarms). In this case, it is the master (client)
and can access SMTP servers at the standard port (25) as well as POP3 servers at the stan-
dard port (110)
Setup PC
IP=x.x.x.x
Local
subnet
This device This device
IP=x.x.x.x IP=x.x.x.x
Figure 1:
Function of the individual nodes
Gateway:
separates local sub-nets from each other and thus filters the packets. Not all packets are received in
every sub-net. Packets from outside the local sub-net must be addressed to the gateway.
DHCP server:
can automatically assign an IP address, sub-net mask, and gateway address to other stations when
switching on. These parameters can also be entered manually, as a DHCP server is not required.
DNS server:
changes symbolic names into IP addresses. Example: the request "www.name.de" will generate the
"www.name.de has IP=10.12.32.45" response.
POP3 server:
serves to read out received e-mails of a mail account. The POP3 mail account can be accessed after
log-in entering user name and password. A successful log-in process often releases the transmission
authorization of a connected SMTP server.
SMTP server:
serves to transmit e-mails. The authorization to transmit e-mails via a mail account must be released
in several networks by previously logging in at the corresponding POP3 server.
Proxy:
62
Other
subnets
Gateway
IP=x.x.x.x
DHCP
server
IP=x.x.x.x
Typical networking in the company network
PC
IP=x.x.x.x
POP3
DNS
server
server
IP=x.x.x.x
IP=x.x.x.x
Port 110
Worldwide
Internet
Proxy
IP=x.x.x.x
SMTP
server
IP=x.x.x.x
Port 25