24.3.1 SMTP Forwarding
Some ISPs require their users to send e-mails via the ISP’s SMTP server. All outgoing SMTP
connections are blocked except those connecting to the ISP’s. Pepwave routers support
intercepting and redirecting all outgoing SMTP connections (destined for TCP port 25) via a
WAN connection to the WAN’s corresponding SMTP server.
To enable the feature, select Enable under SMTP Forwarding Setup . Check Enable
Forwarding for the WAN connection(s) that needs forwarding. Under SMTP Server , enter the
ISP’s e-mail server host name or IP address. Under SMTP Port , enter the TCP port number for
each WAN.
The Pepwave router will intercept SMTP connections. Choose a WAN port according to the
outbound policy, and then forward the connection to the SMTP server if the chosen WAN has
enabled forwarding. If the forwarding is disabled for a WAN connection, SMTP connections for
the WAN will be simply be forwarded to the connection’s original destination.
If you want to route all SMTP connections only to particular WAN connection(s), you should create a
custom rule in outbound policy (see Section 14.2 ).
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