pesarif wrote: > Postfix refuses to send email from one computer on my network to another. > It simply sends me repeated emails that say that the mail could not be delivered and >will be retried because the host could not be found. > > These computers (cups166.reisersun and tux350.reisersun) are right next to each >other and I can telnet to and from them and so I am amazed that postfix on both >computers can't actually see each other.
Postfix (and email on Linux in general) is one of the "black holes" in my personal knowledge base. I thought I was getting the idea, but your question has totally confused me. Does postfix to postfix mail delivery work for you on any other computer -- I would have thought that something like fetchmail (on one computer) would be required to get mail from postfix (on the other computer). (And, to send mail in the other direction, you'd need fetchmail on the second computer to get email from postfix on the first computer.) Can anybody clarify for me? Specifically: * Can postfix on one computer exchange email with postfix on another computer? I guess the computer sending the mail would initiate the transaction? If you know, which ports are used? IIRC, ports 25 and 119 are relevant, does email go from port 25 on the sending computer to port 119 on the receiving computer, or what? * If postfix can exchange email between computers, under what circumstances do you need fetchmail? Thanks, Randy Kramer
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