On Sat, 28 Mar 2009, Robinson, Eric wrote: > Sahil> Is host.domain.com the FQDN of your Postfix server? > Sahil> Why is it an invalid internet address? > > It's not invalid, it's just unknown to the receiving mail server because > there is no reverse DNS for it, which is by design. It's an internal > machine and there should be no reverse DNS for it available on the > Internet. The receiving mail server is configured to reject mail from > computers without reverse DNS.
Did you read the rest of my message where I asked you to investigate masquerade_domains? If you do not want to send mail to the internet with r...@host.domain.com but instead r...@domain.com, then that might be helpful. Or some other type of map like generic. But read the documentation for further illumination. > mouss> may be your "mail" command is using Sendmail instead of the > mouss> sendmail command supplied with postfix. show logs (all the > mouss> logs related to the transaction). > > It isn't. I know this because when postfix is shut down, the mail goes > NOWHERE. tcpdump shows that there is no attempt to deliver the message. No need to tcpdump for this. As per QSHAPE_README: Messages that have been submitted via the Postfix sendmail(1) command, but not yet brought into the main Postfix queue by the pickup(8) service, await processing in the "maildrop" queue. Messages can be added to the "maildrop" queue even when the Postfix system is not running. They will begin to be processed once Postfix is started. > Walt> mail is not postfix. When you send something through > Walt> mail/mailx you are using a smtp client... > Walt> When you telnet 25, you are passing directly to postfix. > Walt> If you want mail/mailx to append envelope/header info with > Walt> something specific, rather than default host.domain.com, > Walt> you might be able to do with with .mailrc or /etc/mail.rc > > I agree that this is probably the problem, but I'm missing some > foundational understanding in order to fix it. > > When you run the 'mail' command, how does it know what MTA to use to > deliver the message? As I said, when postfix is shut down, mail does not > even try to send the message. So somehow mail knows that postfix is not > available? Does it just try to connect to port 25 on localhost? No. As written above, local submissions enter Postfix via pickup(8). Programs like mail(1) use sendmail(1). -- Sahil Tandon <sa...@tandon.net>
