~ overflow ~

Problem:

How to change sendmail’s outgoing ip?

Solution:

This is the ip that will be used to deliver messages, this ip might get blacklisted if one of your happy clients on a shared server decides to send a mass email.
Sendmail is always a bitch to config, but this time it wasn’t, just change your .m4 file adding:

CLIENT_OPTIONS(`Addr=123.456.789')dnl

rebuild the .cf file, restart sendmail and you’re done. In my case, I had a specific ip on the server that got “temporary” (permanently) blocked by gmail. Although new mail wasn’t being sent after the flood, google never unblocked my server, even after a week i still getting “limit rate exceeded” messages. Since I have many IPs on the server it was easier just to bind sendmail to another IP.

Source:

Server Fault

So today i’ve finally reached 100k spam emails on my gmail account, hurray!