can't receive outside mail with sendmail
 

what configuratiosn changes do i need to make to allow sendmail to receive mail from the outside? i want it to be able to accept mail when its sent to the server's ip address like user@68.23.23.232

(Assuming you've got sendmail running) - can you telnet to port 25 on that machine ("telnet localhost 25")? If so, does your IP allow incoming port 25 traffic?

situation resolved. for searchers finding this page in the future this is how i fixed it:




dnl # The following causes sendmail to only listen on the IPv4 loopback address
dnl # 127.0.0.1 and not on any other network devices. Remove the loopback
dnl # address restriction to accept email from the internet or intranet.
dnl #
dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl


the last line there in the sendmail.mc didnt have the 'dnl' in front of it, so i just added it and then m4 it to a .cf. also i had to add the domain that mail be sent to in /etc/local-host-names and then restart sendmail with /sbin/service sendmail restart

what if my server has a nat ip
 

the same situtation, but my server is sit behind a firewall. it has a private ip address of 192.168.30.10. I have a isp ip address statically nat to the private ip address. my firewall has port 25 smtp open, but i cannot telnet to it. I can send email to outside but cannot receive email from other email like from yahoo.com. when i telnet from outside, i telnet to my server using the isp ip address which my firewall then forward to the private ip addresss. please let me know if i am missing any configuration.