sendmail - send email on different IP addresses
 

Hi all,

I have sendmail 8.13.4 running on RedHat4 with 3 IP addresses defined ( eth0 = x.x.x.206, eth0:0 = x.x.x.204, eth0:1 = x.x.x.205). I'm pretty new to configuring sendmail.

I have a C program that sends email notification messages via the sendmail() routine. How do I get sendmail to send emails on alternating network interfaces (different IP's). Automatic round-robin would be nice.

Or perhaps, defining one sendmail.cf for each IP (named: sendmail_204.cf, etc), then have the C program use the "-C /etc/mail/sendmail_204.cf" option to specify which configuration file to use. The problem here is that I do not know how to decalre the IP address inside the sendmail_204.cf file.

Thanks,
Dale

that's not going to be possible from the sending side. you can control what ip addresses are listened on, but it's really none of it's business what IP it sends *from*... you could use logic as described here http://www.linuxquestions.org/questi...s-help-613978/ but to want to round robin over aliased IP addresses really seems to make no sense whatsoever. I really can't imagine a scenario in a real world environment when you'd actually have any reason to do that.