Article describes procedure to configure the DLP Network Interceptor to send mail to "Mail Relay" on port other than port 25. In this example our upstream Mail Relay IP address is 10.10.10.20 and port that it is accepting smtp traffic is port 2525.

a. Go into the controller > Setup and change the interceptor settings and change the ?Mail Relay? to 10.10.10.20 (without the port number).

b. SSH to the interceptor. Go to Shell prompt.
As tablus user:

$ cd /etc/mail.
$ Vi sendmail.mc
Add the following line "define(`RELAY_MAILER_ARGS', `IPC $h 2525')dnl" into the sendmail.mc file. The "IPC $h 2525'" sets the Interceptor to send SMTP traffic to upstream MTA on port 2525.

I have added the other lines to give you a reference on where this line should be put into the .mc file.


dnl # observe max load averages and set appropriately
define(`confREFUSE_LA', `6')
define(`confDELAY_LA', `5')
define(`confCONNECTION_RATE_THROTTLE', 40)dnl
define(`confMIN_FREE_BLOCKS ', 100000)dnl
define(`RELAY_MAILER_ARGS', `IPC $h 2525')dnl

Save the changes using the wq! Option in vi and exit
$ more sendmail.mc | grep RELAY_MAILER_ARG should return the following
define(`RELAY_MAILER_ARGS', `IPC $h 2525')dnl

c. tabservice restart - this is will restart the services on the Interceptor