I'm trying to set up Postfix on the latest Ubuntu and I have followed the official documentation. However, I get the following error message below when trying e.g. telnet localhost 25:

"Connection closed by foreign host".

I have searched around, but i'm unable to find any solution. What can cause this error message?

4

1 Answer

first you need to see ubuntu system log with this command

sudo gedit /var/log/syslog

and if you will see this error "execv( /usr/sbin/tcpd ) failed: No such file or directory" then run this command

sudo apt-get install tcpd

it will solve your problem (if not then you need to search your system error on google)

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