One place this problem arises from is when the ident daemon is being used to track the source of incoming connections. Try adding this to your macro config file on your mail host: define(`confTO_IDENT',`0s')dnl (note that this turns off ident).
|4.9 I keep getting error 552 `message to large'. How do I fix this?||Up||4.11 I'm running sendmail on my firewall or bastion host but I don't want my users accessing this machine to send and receive mail. The external MX records all point at the bastion host which works fine, but I want to configure a host on my internal network for my users to use to send and receive mail. How do I get the mail off of the bastion host and onto the internal host, and how do I still use the bastion host to route the mail?|